GCSE Astronomy Specification PDF - Pearson Edexcel

GCSE (9-1) Astronomy Specification Pearson Edexcel Level 1/Level 2 GCSE (9 - 1) in Astronomy (1AS0) First teaching from September 2017 First certification from June 2019 Issue 3 About Pearson We are the world’s leading learning company operating in countries all around t...

GCSE (9-1) Astronomy Specification Pearson Edexcel Level 1/Level 2 GCSE (9 - 1) in Astronomy (1AS0) First teaching from September 2017 First certification from June 2019 Issue 3 About Pearson We are the world’s leading learning company operating in countries all around the world. We provide content, assessment and digital services to learners, educational institutions, employers, governments and other partners globally. We are committed to helping equip learners with the skills they need to enhance their employability prospects and to succeed in the changing world of work. We believe that wherever learning flourishes so do people. References to third party materials made in this specification are made in good faith. Pearson does not endorse, approve or accept responsibility for the content of materials, which may be subject to change, or any opinions expressed therein. (Materials may include textbooks, journals, magazines and other publications and websites.) All information in this specification is correct at time of publication. Original origami artwork: Mark Bolitho Origami photography: Pearson Education Ltd/Naki Kouyioumtzis ISBN 978 1 446 93341 1 All the material in this publication is copyright © Pearson Education Limited 2024 Summary of Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy (1AS0) specification Issue 3 changes Summary of changes made between previous issue and this current issue Page number Removed requirement and area for teacher signature for Observational Fieldwork 61 Declaration form. If you need further information on these changes or what they mean, contact us via our website at: qualifications.pearson.com/en/support/contact-us.html Contents 1 Introduction 2 Why choose the Edexcel GCSE in Astronomy? 2 Supporting you in planning and implementing this qualification 3 Qualification at a glance 4 2 Subject content and assessment information 6 Paper 1: Naked-eye Astronomy 9 Paper 2: Telescopic Astronomy 23 Observational skills 42 Assessment Objectives 47 3 Administration and general information 48 Entries 48 Access arrangements, reasonable adjustments, special consideration and malpractice 48 Student recruitment and progression 51 Appendix 1: Mathematical skills 55 Appendix 2: Formulae and data sheet 56 Appendix 3: Calculators 58 Appendix 4: Taxonomy 59 Appendix 5: Observation Statement 61 Appendix 6: The context for the development of this qualification 62 Appendix 7: Transferable skills 64 Appendix 8: Codes 65 1 Introduction Why choose the Edexcel GCSE in Astronomy? Supporting success in science Most people are fascinated by the night sky and are interested in stories about our continuing exploration of our Solar System and Universe. This course has been developed to build on that interest and to give an introduction to the subject of astronomy. The course will enable students to understand our position in the Universe, the movements of planets and stars, the cycles in the night and daytime sky, and the way in which we use technology to observe and interact with space. Students will follow an incredible story of how scientists, from ancient civilisations to the modern day, have used their imagination and carefully recorded visual measurement to explore the Universe in which we live. As with our GCSE (9–1) Science specifications, our Astronomy specification is straightforward to deliver. And we’ve selected a range of observational activities to suit schools that are well equipped with telescopes and those that are more modestly resourced. Of course, when it comes to our assessments, they are shaped to encourage all students to best show what they know and can do. Every student is different. But we hope that, across the astronomical content and the suggested observational activities, you can build an inclusive course, to allow your students to enjoy their first steps in astronomy – and maybe turn those steps into giant leaps…! 2 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Supporting you in planning and implementing this qualification Planning Our Getting Started guide gives you an overview of the new GCSE qualification to help you to get to grips with the changes to content and assessment and to help you understand what these changes mean for you and your students. Our mapping documents highlight key differences between the new and 2009 qualifications. Teaching and learning There will also be some free teaching and learning support to help you deliver the new qualifications, including: a course planner and schemes of work that you can adapt to suit your department support in delivering a range of observational activities which form part of the specification content. Preparing for exams We will also provide a range of resources to help you prepare your students for the assessments, including: access to past papers to allow you to develop homework and test resources, marked exemplars of student work with examiner commentaries. ResultsPlus ResultsPlus provides the most detailed analysis available of your students’ exam performance. It can help you identify the topics and skills where further learning would benefit your students. Get help and support Our subject advisor service, led by Stephen Nugus and Julius Edwards will ensure you receive help and guidance from us and that you can share ideas and information with other teachers. Learn more at qualifications.pearson.com Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 3 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Qualification at a glance Content and assessment overview The Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy consists of two externally-examined papers. Students must complete all assessment in May/June in any single year. Paper 1: Naked-eye Astronomy (*Paper code: 1AS0/01) Written examination: 1 hour and 45 minutes 50% of the qualification 100 marks Content overview Topic 1 – Planet Earth Topic 2 – The lunar disc Topic 3 – The Earth-Moon-Sun system Topic 4 – Time and the Earth-Moon-Sun cycles Topic 5 – Solar System observation Topic 6 – Celestial observation Topic 7 – Early models of the Solar System Topic 8 – Planetary motion and gravity Assessment overview A mixture of different question styles, including multiple-choice questions, short-answer questions, calculations, graphical and extended-open-response questions. *See Appendix 8: Codes for a description of this code and all other codes relevant to this qualification. 4 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Paper 2: Telescopic Astronomy (Paper code: 1AS0/02) Written examination: 1 hour and 45 minutes 50% of the qualification 100 marks Content overview Topic 9 – Exploring the Moon Topic 10 – Solar astronomy Topic 11 – Exploring the Solar System Topic 12 – Formation of planetary systems Topic 13 – Exploring starlight Topic 14 – Stellar evolution Topic 15 – Our place in the Galaxy Topic 16 – Cosmology Assessment overview A mixture of different question styles, including multiple-choice questions, short-answer questions, calculations, graphical and extended- open-response questions. Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 5 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 2 Subject content and assessment information The subject content sets out the knowledge, understanding and skills relevant to this qualification. Together with the assessment information, it provides the framework within which centres create their programmes of study. Qualification aims and objectives The aims and objectives of this qualification are to enable students to: understand the structures of the Earth, Moon and Sun; and how their interactions produce many of the astronomical cycles and phenomena of our natural world understand the Earth’s place within the Solar System and the universe; and the forces, which have shaped both our own, and other planetary systems understand the forces governing the life cycles of stars; and demonstrate a knowledge of how stars appear in the night sky understand how astronomers discovered the Earth’s position within our galaxy and the Universe; and understand current theories for the evolution of the Universe understand the challenges inherent in making observations in astronomy; and the ways in which technology has aimed to overcome them apply observational, enquiry and problem-solving skills, through the use of information from aided and unaided astronomical observations; and use these skills to evaluate observations and methodologies develop an informed interest in current astronomical investigations, discoveries and space exploration acquire knowledge and understanding of astronomy theory and practice, and the skills needed to investigate a wide range of astronomical contexts understand that the study and practice of astronomy are interdependent and iterative activities, and appreciate the links between astronomy and other branches of science develop an awareness that the study and practice of astronomy are subject to limitations by e.g. economic, technical, ethical and cultural influences progress to further and higher education courses in the fields of astronomy or physics. 6 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Working scientifically The GCSE in Astronomy requires students to develop the skills, knowledge and understanding of working scientifically. Working scientifically will be assessed through the examinations. 1 Development of scientific thinking a understand how scientific methods and theories develop over time b use a variety of models – such as representational, spatial, descriptive, computational and mathematical – to solve problems, make predictions and develop scientific explanations, and understand familiar and unfamiliar facts and observations c appreciate the power and limitations of theories in astronomy d explain how every day and technological applications of science are used in astronomy; evaluate associated personal, social and economic implications; and make decisions based on the evaluation of evidence and arguments e recognise the importance of peer review of results and of communicating results to a range of audiences. 2 Observational skills and strategies a use scientific theories and explanations to develop hypotheses b plan observations to test hypotheses, check data or explore phenomena c apply knowledge of a range of techniques, instruments and apparatus to select those appropriate to the observation d understand how to carry out observations appropriately with due regard to the correct manipulation of equipment, the accuracy of measurements, and health and safety considerations e understand how to make and record observations and measurements using a range of apparatus and methods f evaluate methods and suggest possible improvements and further iterations. 3 Analysis and evaluation Apply the cycle of collecting, presenting and analysing data, including: a presenting observations and other data using appropriate methods b translating data from one form to another c carrying out and representing mathematical and statistical analyses d representing distributions of results and making estimations of uncertainty e interpreting observations and other data (presented in verbal, diagrammatic, graphical, symbolic or numerical form), including identifying patterns and trends, making inferences and drawing conclusions f presenting reasoned explanations including relating observations and data to hypotheses g being objective, evaluating data in terms of accuracy, precision, repeatability and reproducibility, and identifying potential sources of random and systematic error h communicating the scientific rationale for observations, methods used, findings, and reasoned conclusions through paper-based and electronic reports, and presentations using verbal, diagrammatic, graphical, numerical and symbolic forms. Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 7 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 4 Scientific vocabulary, quantities, units, symbols and nomenclature a use scientific vocabulary, terminology and definitions b recognise the importance of scientific quantities and understand how they are determined c use SI units and related derived units (e.g. kg, km, l.y., pc, AU) d use prefixes and powers of ten for orders of magnitude (e.g. tera, giga, mega, kilo, centi, milli, micro and nano) e interconvert units f use an appropriate number of significant figures in calculation. Mathematics Maths skills will be assessed in the examinations. Those skills that can be assessed in relation to a specification point are referenced in the maths column, next to the specification point. Please see Appendix 1: Mathematical skills for full details of each maths skill. At the end of most topics in this specification, there are details relating to the ‘Use of mathematics’ which give the astronomy-specific mathematic skills that are found in each topic of content in the document Astronomy GCSE subject content, published by the Department for Education (DfE) in March 2016. The reference in brackets after each statement refers to the mathematical skills from Appendix 1. Please see Appendix 3: Calculators for information on the use of calculators in the assessments of this qualification. Equations Students are not required to recall any equations. The equations that students are expected to be able to use are listed in the specification points and in Appendix 2: Formulae and data sheet. The formulae and data sheet for each examination are given in the examination paper. Content The specification points all begin with either ‘know’, ‘understand’ or ‘be able to’. These command words indicate the depth to which the content must be studied. A ‘know’ statement is limited to recalling the facts in the specification content. An ‘understand’ statement includes all aspects of ‘know’ and additional depth to reach an understanding of the content. A ‘be able to’ statement includes all aspects of ‘know’ and ‘understand’, as well as application of skills for the specification content. For example specification statement 1.4 states ‘Be able to use the latitude and longitude co-ordinate system’. This means that students can be expected to use the longitude and latitude system in questions relating to positions on Earth. They could also be asked to explain how longitude and latitude are different to each other and also to recall a definition for longitude and latitude. 8 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Paper 1: Naked-eye Astronomy Topic 1 – Planet Earth Students will gain an understanding of the planet Earth and its internal structure. They will learn about the major divisions on Earth’s surface and how its atmosphere affects observations. Students should: Maths skills 1.1 Know that the shape of the Earth is an oblate spheroid 1.2 Be able to use information about the mean diameter of the 2a, 2b Earth (13 000 km) 1.3 Understand the Earth’s major internal divisions and their features: a crust b mantle c outer core d inner core 1.4 Be able to use the latitude and longitude co-ordinate system 5a, 5d 1.5 Be able to use the major divisions of the Earth’s surface as 5a, 5d astronomical reference points, including: a Equator b Tropic of Cancer c Tropic of Capricorn d Arctic Circle e Antarctic Circle f Prime Meridian g North Pole h South Pole 1.6 Understand the effects of the Earth’s atmosphere on astronomical observations, including sky colour, skyglow (light pollution) and ‘twinkling’ (seeing) Use of mathematics use angular measures in degrees (5a) use ideas of latitude and longitude (5d) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 9 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 2 – The lunar disc Students will gain an understanding of the Moon and its surface formations, and be able to identify some of the main features on its surface. Students will study the rotation and revolution of the Moon and the effect of libration. Students should: Maths skills 2.1 Know the shape of the Moon 2.2 Be able to use information about the mean diameter of the 1a, 1b Moon (3500 km) 2f 2.3 Be able to recognise the appearance of the principal naked-eye lunar surface formations, including: a craters b maria c terrae d mountains e valleys 2.4 Understand the structure and origin of the principal naked-eye lunar surface formations, including: a craters b maria c terrae d mountains e valleys 2.5 Be able to identify the following features on the lunar disc: a Sea of Tranquility b Ocean of Storms c Sea of Crises d Tycho e Copernicus f Kepler g Apennine mountain range 2.6 Be able to use the rotation and revolution (orbital) periods of 1a the Moon 2.7 Understand the synchronous nature of the Moon’s orbit 2.8 Understand the causes of lunar libration and its effect on the visibility of the lunar disc 10 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Use of mathematics use ratios to determine the relative sizes of the Moon, Earth and Sun (1c) translate information between graphical and numerical forms, for example when working with data on shadow lengths and directions from shadow sticks and sundials or on tides (4a) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 11 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 3 – The Earth-Moon-Sun system Students will gain an understanding of the relationship between the Earth, Moon and Sun and how they affect each other. They will also study tides, precession and eclipses. Students should: Maths skills 3.1 Be able to use the relative sizes of the Earth, Moon and Sun 1c 2f 3.2 Be able to use the relative distances between the Earth, Moon 1b, 1c and Sun 2f 3.3 Understand how Eratosthenes and Aristarchus used 1b, 1c observations of the Moon and Sun to determine successively: 3a a diameter of the Earth 5a, 5b, 5c b diameter of the Moon c distance to the Moon d distance to the Sun e diameter of the Sun 3.4 Be able to use information about the mean diameter of the 1b, 1c Sun (1.4 × 106 km) 3.5 Understand the relative effects of the Sun and Moon in producing high and low, spring and neap tides 3.6 Understand how the gradual precession of the Earth’s axis affects the appearance of the Sun, Moon and stars, when observed from Earth, and its use in archaeoastronomy 3.7 Be able to use data relating to the rate of precession of the 1a Earth’s axis 5a, 5b, 5d 3.8 Understand the appearance of the Sun during partial, total and annular solar eclipses, including the terms first, second, third and fourth umbral contact 3.9 Understand the appearance of the Moon during partial and total lunar eclipses, including the terms first, second, third and fourth umbral contact 3.10 Understand the causes of solar and lunar eclipses 12 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Use of mathematics substitute numerical values into algebraic equations using appropriate physical quantities, for example in reproducing Eratosthenes’ calculations or when using the Equation of Time (3c) use angular measures in degrees (5a) recognise and use expressions in standard form, for example when considering the actual size and relative scale of the Earth-Moon-Sun system (1b) use ratios to determine the relative sizes of the Moon, Earth and Sun (1c) use specialist units such as the AU (2c) use degrees, minutes and seconds of arc (5b) substitute numerical values into algebraic equations using appropriate physical quantities, for example in reproducing Eratosthenes’ calculations (3c) change the subject of an equation (3b) substitute numerical values into algebraic equations using appropriate physical quantities (3c) solve simple algebraic equations (3d) use angular measure in degrees when using the declination system (5a) use degrees, minutes and seconds of arc when working with the celestial and horizon coordinate systems (5b) translate information between graphical and numerical forms, e.g. when working with data on shadow lengths and directions from shadow sticks and sundials or on tides (4a) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 13 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 4 – Time and the Earth-Moon-Sun cycles Students will gain an understanding of astronomical definitions and measurements of time. They will study synodic and sidereal time, solstices and equinoxes and the need for time zones. Students should: Maths skills 4.1 Understand the difference between sidereal and synodic (solar) days 4.2 Understand the role of the Sun in determining Apparent Solar Time (AST) 4.3 Understand the role of the Mean Sun in determining Mean Solar Time (MST) and Local Mean Time (LMT) 4.4 Be able to use: 3b, 3c, 3d the Equation of Time = Apparent Solar Time (AST) − Mean Solar Time (MST) 4.5 Understand the annual variation of the Equation of Time 4a 4.6 Understand the causes of the annual variation of the 4a Equation of Time 4.7 Understand how to determine the time of local noon using 1a shadows, including use of a shadow stick 3b 4a, 4b 4.8 Understand the structure and use of sundials 4.9 Understand the lunar phase cycle 4.10 Understand the difference between sidereal and synodic (solar) months 4.11 Understand the annual variation in times of sunrise and sunset 4a 4.12 Understand the astronomical significance of equinoxes and solstices 4.13 Understand the variation in the Sun’s apparent motion during the year, particularly at the equinoxes and solstices 4.14 Understand the relationship between sidereal and synodic (solar) time 4.15 Understand the difference in local time for observers at different longitudes 4.16 Understand the use of time zones 4.17 Be able to use data related to time zones 1a, 1c 5a, 5b 4.18 Know that mean time at any point along the Prime Meridian is defined as Greenwich Mean Time (GMT), which is the same as Universal Time (UT) 14 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 4.19 Be able to use shadow-stick data and the Equation of Time to 1a determine longitude 3b 4a 5a 4.20 Understand the principles of astronomical methods for the determination of longitude, including the lunar distance method 4.21 Understand the principle of the horological method for the determination of longitude (Harrison’s marine chronometer) (knowledge of internal working of chronometers not required) Use of mathematics substitute numerical values into algebraic equations using appropriate physical quantities, for example in reproducing Eratosthenes’ calculations or when using the Equation of Time (3c) use angular measures in degrees (5a) use ideas of latitude and longitude (5d) translate information between graphical and numerical forms, for example when working with data on shadow lengths and directions from shadow sticks and sundials or on tides (4a) change the subject of an equation, for example the Equation of Time (3b) solve simple algebraic equations (3d) convert between hours, minutes and seconds, and decimal fractions of hours (5b) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 15 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 5 – Solar System observation Students will gain an understanding of how to observe the Sun and planets, including the locations of the planets in relation to the Earth and the Sun and safely observing the Sun. Students should: Maths skills 5.1 Understand how to use pinhole projection to observe the Sun safely 5.2 Understand the observed motion of the Sun follows an annual path called the ecliptic 5.3 Understand the changing position of the planets in the night 4a sky 5.4 Understand the observed motion of the planets takes place 4a within a narrow Zodiacal Band 5.5 Understand the observed retrograde motion of planets 4a 5.6 Understand the terms First Point of Aries and First Point of Libra 5.7 Understand the appearance and cause of meteors and meteor showers, including determination of the radiant 5.8 Understand the terms: 2c a conjunction (superior and inferior) 4a b opposition 5a c elongation d transit e occultation Use of mathematics use specialist units such as the AU (2c) translate information between graphical and numeric form (4a) 16 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 6 – Celestial observation Students will gain an understanding of how to observe a variety of naked-eye astronomical phenomena. They will study how to plan their observations to be at the best time and location, taking into account effects such as weather and light pollution. Students should: Maths skills 6.1 Be able to recognise the following astronomical phenomena visible to the naked eye, including: a Sun b Moon c stars (including double stars, constellations and asterisms) d star clusters e galaxies and nebulae f planets g comets h meteors i aurorae j supernovae and artificial objects, including: k artificial satellites l aircraft 6.2 Be able to recognise and draw the following constellations and asterisms, including their most prominent stars: a Cassiopeia b Cygnus c Orion d Plough e Southern Cross f Summer Triangle g Square of Pegasus 6.3 Understand the use of asterisms as pointers to locate specific objects in the night sky, including: a Arcturus and Polaris from the Plough b Sirius, Aldebaran and the Pleiades from Orion’s Belt c Fomalhaut and the Andromeda galaxy from Square of Pegasus 6.4 Understand why there is a range of constellation, asterism and star names among different cultures Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 17 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Students should: Maths skills 6.5 Be able to use information from star charts, planispheres, computer programs or ‘apps’ to identify objects in the night sky 6.6 Understand the causes and effects of light pollution on observations of the night sky 6.7 Understand the meaning of the terms: 5a a celestial sphere b celestial poles c celestial equator 6.8 Understand the use of the equatorial coordinate system 5a, 5b, 5c (right ascension and declination) 6.9 Understand the use of the horizon coordinate system 5a, 5b, 5c (altitude and azimuth) 6.10 Understand how the observer’s latitude can be used to link the 1a equatorial and horizon coordinates of an object for the 4a observer’s meridian 5a, 5b, 5c 6.11 Understand how the observer’s meridian defines local sidereal 1a time and an object’s hour angle 4a 5a, 5b, 5c 6.12 Be able to use information on equatorial and horizon 1a coordinates to determine: 4a a the best time to observe a particular celestial object 5a, 5b, 5c b the best object(s) to observe at a particular time 6.13 Understand, in relation to astronomical observations, the terms: a cardinal points b culmination c meridian d zenith e circumpolarity 6.14 Understand the diurnal motion of the sky due to the Earth’s 4a rotation 5a 6.15 Be able to use a star’s declination to determine whether the 4a star will be circumpolar from an observer’s latitude 5a, 5b 6.16 Understand the apparent motion of circumpolar stars, 4a including upper transit (culmination) and lower transit 5a, 5b 18 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 6.17 Be able to use information about rising and setting times of 1c stars to predict their approximate position in the sky 4a 6.18 Be able to find the latitude of an observer using Polaris 5a, 5b, 5c 6.19 Understand naked eye techniques such as dark adaptation and averted vision 6.20 Understand the factors affecting visibility, including: a rising and setting b seeing conditions c weather conditions d landscape 6.21 Understand the appearance of the Milky Way from Earth as seen with the naked eye Use of mathematics use angular measures in degrees (5a) use ideas of latitude and longitude (5d) change the subject of an equation (3b) substitute numerical values into algebraic equations using appropriate physical quantities (3c) solve simple algebraic equations (3d) translate information between graphical and numeric form such as on the Hertzsprung-Russell diagram (4a) use angular measure in degrees when using the declination system (5a) use degrees, minutes and seconds of arc when working with the celestial and horizon coordinate systems (5b) use the concept of subtended angle when working with the celestial and horizon coordinate systems (5c) use concepts of 3D motion, rotation and coordinates on a sphere when working with the celestial and horizon coordinate systems (5d) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 19 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 7 – Early models of the Solar System Students will gain an understanding of how ancient civilisations observed the Solar System. They will also study how early astronomers modelled the Solar System. Students should: Maths skills 7.1 Understand the use of detailed observations of solar and lunar cycles by ancient civilisations around the world for: a agricultural systems b religious systems c time and calendar systems d alignments of ancient monuments 7.2 Understand that the current celestial alignment of ancient monuments differs from their original celestial alignment due to the precession of the Earth’s axis 7.3 Understand early geocentric models of the Solar System 7.4 Understand the advantage of the addition of epicycles, as described by Ptolemy 7.5 Be able to use information about the scale of the Solar System 2c, 2f 7.6 Be able to use the astronomical unit (1 AU = 1.5 × 108 km), 2c light year (l.y.) and parsec (pc) Use of mathematics use specialist units: AU, l.y. and pc when considering the size of Solar System and the distances to other stars (2c) translate information between graphical and numeric form (4a) 20 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 8 – Planetary motion and gravity Students will gain an understanding of the motion of the planets around the Sun and the role of gravity. They will study Kepler’s laws of planetary motion and Newton’s law of universal gravitation. Students should: Maths skills 8.1 Understand the contribution of the observational work of Brahe in the transition from a geocentric to a heliocentric model of the Solar System 8.2 Understand the contribution of the mathematical modelling of Copernicus and Kepler in the transition from a geocentric to a heliocentric model of the Solar System 8.3 Understand the role of gravity in creating stable elliptical orbits 8.4 Understand Kepler's laws of planetary motion 4a 5a 8.5 Understand the terms ‘aphelion’ and ‘perihelion’ (solar orbits), 4a ‘apogee’ and ‘perigee’ (Earth orbits) for an elliptical orbit 5a 8.6 Be able to use Kepler’s third law in the form: 1e 2 T = a constant 3b, 3c, 3d 3 r 4b where T is the orbital period of an orbiting body and r is the mean radius of its orbit 8.7 Understand that the constant in Kepler’s third law depends 1c, 1e inversely on the mass of the central body 3b, 3c, 3d 8.8 Know that Newton was able to explain Kepler’s laws using his law of universal gravitation 8.9 Understand that the gravitational force between two bodies is 1c, 1e proportional to the product of their masses and inversely proportional to the square of their separation (algebraic expression of Newton’s law of universal gravitation not required) Use of mathematics use specialist units: AU, l.y. and pc when considering the size of Solar System and the distances to other stars (2c) use ratios and inverse square relationships when using Newton’s law of universal gravitation (1c) solve algebraic equations such as Kepler’s third law of planetary motion (3d) translate information between graphical and numeric form (4a) plot two variables from experimental or other data (4b) use a calculator to determine squares, square roots and cubes of positive numbers when using Kepler’s third law of planetary motion (1e) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 21 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Assessment information First assessment: May/June 2019. The assessment is 1 hour and 45 minutes. The assessment consists of ten questions. The assessment is out of 100 marks. Students must answer all questions. The paper will include multiple-choice, short-answer questions, calculations, graphical and extended-open-response questions. Calculators may be used in the examination. Information regarding the use of calculators during the examinations for this qualification can be found in Appendix 3: Calculators. Synoptic assessment Synoptic assessment requires students to work across different parts of a qualification and to show their accumulated knowledge and understanding of a topic or subject area. Synoptic assessment enables students to show their ability to combine their skills, knowledge and understanding with breadth and depth of the subject. This paper assesses synopticity. Sample assessment materials A sample paper and mark scheme for this paper can be found in the Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Sample Assessment Materials (SAMs) document. Please see Appendix 4 for a description of what the command words used in the SAMs mean. 22 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Paper 2: Telescopic Astronomy Topic 9 – Exploring the Moon Students will gain an understanding of the Moon, its internal structure and features on the far side. They will study how the constant drive to improve the accuracy, detail and range of observations has provided a context for the exploration of the Moon. Students should: Maths skills 9.1 Understand the Moon’s major internal divisions in comparison with those of the Earth 9.2 Understand the major differences between the appearance of the Moon’s near and far sides 9.3 Understand how information has been gathered about the Moon's far side 9.4 Understand that a spacecraft traveling to the Moon must reach the Earth’s escape velocity, the energy requirements of which can be met only by the use of rockets 9.5 Understand the Giant Impact Hypothesis and alternative theories of the Moon’s origin, including Capture Theory and Co-accretion Theory Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 23 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 10 – Solar astronomy Students will gain an understanding of the structure of the Sun, its energy production process and the solar wind. Students will also use sunspot data to determine information about the Sun’s rotation period and the solar cycle. Students should: Maths skills 10.1 Understand methods of observing the Sun safely, including: a telescopic projection b H-alpha filter 10.2 Know the location and relative temperatures of the Sun’s internal divisions, including: a core b radiative zone c convective zone d photosphere 10.3 Understand the role of the Sun’s internal divisions in terms of energy production and transfer 10.4 Understand the principal nuclear fusion process in the Sun (the proton-proton cycle) 10.5 Know the location, temperature and relative density of components of the solar atmosphere, including: a chromosphere b corona 10.6 Understand the structure, origin and evolution of sunspots 10.7 Be able to use sunspot data to determine the mean solar 1c rotation period 2b 4a 5a, 5b 10.8 Be able to use sunspot data relating to the solar cycle 4a 10.9 Understand the different appearance of the Sun when observed using radiation from the different regions of the electromagnetic spectrum 10.10 Understand the nature, composition and origin of the solar wind 24 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 10.11 Understand the principal effects of the solar wind, including: a aurorae b cometary tails c geomagnetic storms d the effects on satellites, aircraft travel and manned missions 10.12 Know the shape and position of the Earth’s magnetosphere including the Van Allen Belts Use of mathematics use angular measures in degrees (5a) translate information between graphical and numerical forms, for example when working with data on shadow lengths and directions from shadow sticks and sundials or on tides (4a) solve simple algebraic equations (3d) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 25 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 11 – Exploring the Solar System Students will investigate the main bodies in the Solar System and their characteristics. They will gain understanding that the constant drive to improve the accuracy, detail and range of observations has provided a context for the invention of the telescope, the development of the space telescope and probes to the outer reaches of our Solar System and has provided a context for the manned exploration of the Moon. Students should: Maths skills 11.1 Be able to use data about the names and relative locations of 2a, 2c bodies in the Solar System, including: 4b a planets b dwarf planets c Small Solar System Objects (SSSOs): asteroids, meteoroids and comets 11.2 Understand the structure of comets (nucleus, coma and tails) 11.3 Understand the orbits of short-period comets and their likely origin in the Kuiper Belt 11.4 Understand the orbits of long-period comets and their likely origin in the Oort Cloud 11.5 Understand the location and nature of the Kuiper Belt, Oort Cloud and the heliosphere 11.6 Understand the following principal characteristics of the planets: a relative size b relative mass c surface temperature d atmospheric composition e presence of satellites f presence of ring systems 11.7 Understand the main theories for the formation and current position of the gas giant planets in our Solar System 11.8 Be able to use information about the size of the Solar System 2c 11.9 Be able to use the astronomical unit (1 AU = 1.5 × 108 km), 2c light year (l.y.) and parsec (pc) 11.10 Understand the origin and structure of meteoroids and meteorites 11.11 Know that most bodies in the Solar System orbit the Sun in, or close to, a plane called the ecliptic 11.12 Understand the use of transits of Venus (as proposed by 5a, 5b Halley) to determine the size of the astronomical unit and thus the absolute size of the Solar System 26 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 11.13 Understand the main theories for the origin of water on Earth 11.14 Know that the human eye is limited in astronomical observations by its small aperture and limited sensitivity in low light 11.15 Understand how the objective element of a telescope captures and focuses light so that the image can be magnified by an eyepiece 11.16 Know that convex (converging) lenses and concave (converging) mirrors can be used to collect and focus light from astronomical objects 11.17 Understand how simple telescopes can be made by combining an objective (lens or mirror) with an eyepiece 11.18 Understand the basic design of the following in terms of their key elements: a Galilean refracting telescope b Keplerian refracting telescope c Newtonian reflecting telescope d Cassegrain reflecting telescope (detailed ray diagrams not required) 11.19 Understand that the ‘light grasp’ of a telescope is directly 1c, 1e proportional to the area of the objective element and thus the square of the diameter of the objective element 11.20 Know that the aperture of a telescope is related to the diameter of the objective element 11.21 Know that the field of view is the circle of sky visible through 5a, 5b the eyepiece, measured in degrees or arcmin 11.22 Understand the resolution of a telescope is: 1c a proportional to the diameter of the objective element 5b, 5c b reduced by observing at a longer wavelength 11.23 Be able to use the formula for the magnification of a 3a, 3b, 3c, 3d telescope: fo magnificat ion = fe where fo is the focal length of the objective element and fe is the focal length of the eyepiece 11.24 Understand the importance of Galileo's early telescopic observations in establishing a heliocentric (Sun-centred) model of the Solar System Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 27 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Students should: Maths skills 11.25 Understand the advantages of reflecting telescopes compared to refracting telescopes, in terms of: a chromatic aberration b very long focal lengths c using large aperture objectives d use of multiple mirrors 11.26 Understand the advantages and disadvantages of the major types of space probe: a fly-by b orbiter c impactor d lander 11.27 Know an example of each type of space probe, including target body and major discoveries, including: a fly-by – New Horizons (Outer Solar System) b orbiter – Juno (Jupiter) or Dawn (asteroids Vesta and Ceres) c impactor – Deep Impact (comet Tempel 1) d lander – Philae (comet 67P/Churyumov–Gerasimenko) 11.28 Understand that a space probe must reach the Earth’s escape velocity, the energy requirements of which can be met only by the use of rockets 11.29 Understand the advantages and disadvantages of direct observation via manned missions 11.30 Understand the main features of the Apollo programme to land astronauts on the Moon 28 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Use of mathematics use angular measures in degrees (5a) use specialist units: AU, l.y. and pc when considering the size of Solar System and the distances to other stars (2c) plot two variables from experimental or other data (4b) determine the slope of a linear graph such as when determining Hubble’s constant (4c) change the subject of an equation such as when using the equation for telescopic magnification (3b) substitute numerical values into algebraic equations using appropriate physical quantities (3c) solve simple algebraic equations (3d) translate information between graphical and numeric form (4a) use ratios and inverse square relationships such as when calculating telescopic magnification and light grasp (1c) use degrees, minutes and seconds of arc such as when considering telescopic resolution (5b) use the concept of subtended angle (5c) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 29 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 12 – Formation of planetary systems Students will gain an understanding of how the interaction of gravitational and tidal forces led to the formation of our Solar System. They will use this information to study exoplanets and also the possibility of life existing elsewhere. Students should: Maths skills 12.1 Be able to identify the operation of each of the following in our Solar System: a gravitational attraction producing regular motion, including the orbits of planets and moons b tidal gravitational forces producing effects, including ring systems, asteroid belts and internal heating c gravitational interactions of multiple bodies producing effects such as gradual shifts in orbits, chaotic motion, resonances and the significance of Lagrangian Points (detailed mathematical descriptions not required) d accidental collisions causing impact craters, changes to orbital motions or planetary orientations e solar wind affecting comets, planetary atmospheres and the heliosphere 12.2 Be able to identify the operation of each of the following interactions in the formation of planets and moons: a the interaction between tidal gravitational and elastic forces to determine whether a body is broken apart (Roche Limit) b the interaction between attractive gravitational and elastic forces in determining a body’s spherical or irregular shape c the interaction between gravitational and thermal factors in determining the presence of an atmosphere 12.3 Understand the main theories for the formation of gas giant planets in planetary systems 12.4 Understand the current methods for discovering systems of exoplanets, including transit method, astrometry and radial velocity measurements 12.5 Understand the requirements for life and the possibility of life- forms existing elsewhere, including: a on Titan b on Europa c on Enceladus d outside our Solar System 12.6 Understand the relevance of the Goldilocks (Habitable) Zones 12.7 Understand how factors in the Drake equation can be used to 2a, 2e allow us to estimate the number of civilisations in our Galaxy 30 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 12.8 Understand the search for extra-terrestrial intelligence, by receiving radio waves (SETI), including the benefits and dangers of discovering extra-terrestrial life Use of mathematics solve simple problems using numerical probability (2e) understand the principles of calculations involving light years (2d) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 31 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 13 – Exploring starlight Students will gain an understanding of how stars are observed and how we can obtain information about them from just observing the light they emit. They will study the evolution of stars and different types of stars. Students will also find out why we observe stars in different parts of the electromagnetic spectrum and where telescopes are located to enable better observations to be made. Students should: Maths skills 13.1 Understand the astronomical magnitude scale and how 1a, 1c apparent magnitude relates to the brightness of stars as viewed from Earth 13.2 Understand the term absolute magnitude 1c 13.3 Be able to use the distance modulus formula to determine the 1a, 1d absolute (M) or apparent magnitude (m) of a star, given the 2c distance to the star (d): 3b, 3c, 3d M = m + 5 − 5 log d where d is the distance in parsec 13.4 Understand what information can be obtained from a stellar spectrum, including a chemical composition b temperature c radial velocity 13.5 Understand how stars can be classified according to spectral type 13.6 Understand how a star’s colour and spectral type are related to its surface temperature 13.7 Be able to sketch a simple Hertzsprung-Russell diagram, including labelled axes and indicate the positions of the following: a main sequence stars b the Sun c red and blue giant stars d white dwarf stars e supergiant stars 13.8 Understand how a star’s life cycle relates to its position on the Hertzsprung-Russell diagram, for stars similar in mass to the Sun and those with masses that are much greater 13.9 Understand the inverse square relationship between distance 1c, 1e and brightness/intensity 32 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 13.10 Understand that an angle of one degree (°)comprises 5b 60 minutes of arc (arcmin) (60’) and that each arcminute is comprised of 60 seconds of arc (arcsec) (60") 13.11 Understand the term parsec (pc) 2c, 2d 13.12 Be able to determine astronomical distances using heliocentric 1a, 1c parallax 2c 13.13 Understand how to use a Hertzsprung-Russell diagram to 4a determine distances to stars 13.14 Understand the light curves of the following variable stars: a short/long period b eclipsing binary c Cepheid d novae and supernovae 13.15 Understand the causes of variability in the light curve of eclipsing binary stars 13.16 Understand how Cepheid variables can be used to determine 4a distances 13.17 Understand the structure of gravitationally bound stellar groupings such as binary stars and clusters 13.18 Understand how the period of an eclipsing binary star can be 4a deduced from its light curve 13.19 Be able to use star trail photographs to determine the length 1c of the sidereal day 5a, 5b, 5c 13.20 Know that most modern astronomical observations are recorded using digital sensors that convert light into electrical signals, which can then be processed and stored as data files 13.21 Understand how astronomers obtain and study the patterns of spectral lines in the light from astronomical objects 13.22 Know that the Earth’s atmosphere blocks almost all of the 4a radiation of different wavelengths in the electromagnetic spectrum, except visible light and radio waves 13.23 Know that only optical and radio telescopes should be located at sea level on the Earth’s surface 13.24 Understand how a simple radio telescope operates 13.25 Understand why radio telescopes need extremely large 1c apertures in order to maintain a useful resolution 13.26 Understand how multiple radio telescopes can operate as an aperture synthesis system (array) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 33 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Students should: Maths skills 13.27 Know that radio astronomy has been important in the discovery of quasars, jets from black holes, the structure of the Milky Way and protoplanetary discs 13.28 Understand why some infrared telescopes can operate in high-altitude locations, on the Earth's surface 13.29 Know that infrared astronomy has been important in the discovery of protostars, dust and molecular clouds and hotspots on moons 13.30 Understand the detrimental effect of the Earth's atmosphere on the quality of images formed by telescopes on the Earth’s surface 13.31 Understand why telescopes operating outside the optical and radio ‘windows’ need to be sited above the Earth’s atmosphere 13.32 Understand the advantages and disadvantages of space telescopes and detectors, including orbital observing platforms 13.33 Understand how gamma ray, x-ray and ultraviolet astronomy have been important in the discovery of gamma ray bursts, black hole accretion discs and the corona and chromosphere structure of young stars 13.34 Understand how a telescope alters the appearance of: a stars b double stars c binary stars d open clusters e globular clusters f nebulae g galaxies 34 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Use of mathematics change the subject of an equation (3b) substitute numerical values into algebraic equations using appropriate physical quantities (3c) solve simple algebraic equations (3d) translate information between graphical and numeric form such as on the Hertzsprung-Russell diagram (4a) plot two variables from experimental or other data such as when using the right ascension (RA) and declination (dec) coordinate system or when plotting a stellar light curve or Hertzsprung-Russell diagram (4b) use specialist units such as l.y, pc and kpc when considering the distances to stars (2c) understand the principles of calculations involving light years (2d) use ratios and inverse square relationships such as when considering the decreasing apparent brightness of stars with increasing distance (1c) use degrees, minutes and seconds of arc when working with the celestial and horizon coordinate systems (5b) understand and use logarithms (base 10) in equations and as scales and graphs such as when using the distance modulus formula (1d) Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 35 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 14 – Stellar evolution Students will gain an understanding of how and why stars evolve. They will study how stars form and how they end their life, depending on their size. Students should: Maths skills 14.1 Be able to use the Messier and New General Catalogue (NGC) in cataloguing nebulae, clusters and galaxies 14.2 Be able to use the Bayer system for naming the brightest stars within a constellation 14.3 Understand the effects of the interaction between radiation pressure and gravity in a main sequence star 14.4 Understand changes to the radiation pressure-gravity balance 3a at different stages in the life cycle of a star with a mass similar to the Sun 14.5 Understand the balance between electron pressure and gravity in a white dwarf star 14.6 Understand changes to the radiation pressure-gravity balance 3a at different stages in the life cycle of a star with a mass much greater than the Sun 14.7 Understand the balance between neutron pressure and gravity in a neutron star 14.8 Understand the effect the Chandrasekhar Limit has on the outcome on the final stages of the life cycle of a star 14.9 Understand the principal stages and timescales of stellar evolution for stars of similar mass to the Sun, including: a emission and absorption nebula b main sequence star c planetary nebula d red giant e white dwarf f black dwarf 36 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 14.10 Understand the principal stages and timescales of stellar evolution for stars of much larger mass than the Sun, including: a) emission and absorption nebula b) main sequence star c) red super giant d) supernova e) neutron star f) black hole 14.11 Understand how astronomers study and gather evidence for the existence of black holes Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 37 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 15 – Our place in the Galaxy Students will gain an understanding of the Milky Way, our place in it and how it fits into the Universe. They will study different types of galaxies and the main theories for their evolution. Students should: Maths skills 15.1 Understand the appearance of the Milky Way from Earth as seen with binoculars or a small telescope 15.2 Know the size and shape of our Galaxy and the location of the Sun, dust, sites of star formation and globular clusters 15.3 Understand how 21 cm radio waves, rather than visible light, are used to determine the structure and rotation of our Galaxy 15.4 Know that the group of galaxies gravitationally linked to the Milky Way is called the Local Group 15.5 Know the composition and scale of the Local Group, including its principal components: a Andromeda Galaxy (M31) b Large and Small Magellanic Clouds (LMC and SMC) c Triangulum Galaxy (M33) 15.6 Be able to classify galaxies using the Hubble classification system, including: a spiral b barred spiral c elliptical d irregular 15.7 Know how the different types of galaxies were placed by Hubble on his ‘Tuning Fork’ diagram 15.8 Know that the Milky Way is a barred spiral (SBb) type galaxy 15.9 Know that some galaxies emit large quantities of radiation in addition to visible light 15.10 Know that an Active Galactic Nucleus (AGN) is powered by matter falling onto a super-massive black hole 15.11 Know types of active galaxies, including: a Seyfert galaxies b quasars c blazars 38 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 15.12 Know that information about AGNs can be obtained from many regions of the electromagnetic spectrum 15.13 Understand why galaxies are grouped in larger clusters and superclusters 15.14 Understand the main theories for the formation and evolution of galaxies Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 39 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Topic 16 – Cosmology Students will gain an understanding of redshift and Hubble’s law for distant galaxies. They will also study the evidence and explanation for the expanding Universe. Students will explore dark matter and dark energy and the possible fate of the Universe. Students should: Maths skills 16.1 Know that observations of galaxies outside the Local Group show that light is shifted to longer wavelengths (redshift) 16.2 Understand that redshift is caused by galaxies receding from us 16.3 Be able to use the formula: 1a, 1b λ − λ0 v 2a, 2c = λ0 c 3a, 3b, 3c, 3d where λ is the observed wavelength, λ0 is the emitted 4a wavelength, v is the radial velocity of the source, c is the speed of light 16.4 Understand the evidence to confirm the discovery of the expanding universe 16.5 Be able to use the relationship between distance and redshift 1a, 1b, 1c of distant galaxies (Hubble’s law) including the formula: 2c v = H 0d 3a, 3b, 3c, 3d where v is the radial velocity of the recession of the galaxy, Ho 4a, 4b, 4c is the Hubble constant and d is the distance of the galaxy from Earth. 16.6 Understand the estimation of the age and size of the Universe 2c, 2f using the value of the Hubble constant 3b, 3c, 3d 16.7 Understand how the expansion of the Universe supports both the Big Bang theory and the Steady State theory 16.8 Understand the major observational evidence in favour of the Big Bang theory: a quasars (QSOs) b cosmic microwave background (CMB) radiation c Hubble Deep Field image 16.9 Understand the significance of the fluctuations in the CMB radiation for theories of the evolution of the Universe, including discoveries by the Wilkinson Microwave Anisotropy Probe (WMAP) and the Planck mission 40 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Students should: Maths skills 16.10 Understand the significance and possible nature of dark matter and dark energy 16.11 Understand the difficulties involved in the detection of dark matter and dark energy 16.12 Understand that current models of the Universe predict different future evolutionary paths Use of mathematics change the subject of an equation such as Hubble’s law (3b) substitute numerical values into algebraic equations, such as Hubble’s law, using appropriate physical quantities (3c) solve simple algebraic equations such as Hubble’s law (3d) translate information between graphical and numeric form such as when working with data on the distances and recessional speeds of distant galaxies (4a) plot two variables from experimental or other data such as when working with data on the distances and recessional speeds of distant galaxies (4b) determine the slope of a linear graph such as when determining Hubble’s constant (4c) use specialist units such as l.y., pc and kpc when working with distances to objects within our Galaxy and (Mpc) when considering the distances to other galaxies (2c) understand the principles of calculations involving light years (2d) use ratios and inverse relationships such as when using Hubble’s law (1c) Assessment information First assessment: May/June 2019. The assessment is 1 hour and 45 minutes. The assessment consists of ten questions. The assessment is out of 100 marks. Students must answer all questions. The paper will include multiple-choice, short-answer questions, calculations, graphical and extended-open-response questions. Calculators may be used in the examination. Information regarding the use of calculators during the examinations for this qualification can be found in Appendix 3: Calculators. Synoptic assessment Synoptic assessment requires students to work across different parts of a qualification and to show their accumulated knowledge and understanding of a topic or subject area. Synoptic assessment enables students to show their ability to combine their skills, knowledge and understanding with breadth and depth of the subject. This paper assesses synopticity. Sample assessment materials A sample paper and mark scheme for this paper can be found in the Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Sample Assessment Materials (SAMs) document. Please see Appendix 4 for a description of what the command words used in the SAMs mean. Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 41 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Observational skills Requirements Throughout their study of this qualification, students should develop their observational skills. Students must undertake at least one unaided and one aided observation, from the selection listed in this section. Students will need to use their knowledge and understanding of observational techniques and procedures in the written assessments. Students need to record the work that they have undertaken for these observations. The observation record must include the knowledge, skills and understanding they have derived from the observational activities. Centres must confirm that each student has completed at least one unaided and one aided observation by completing and submitting an Observation Statement (see Appendix 5). This must be submitted to Pearson by 15th April in the year that the students will sit their examinations. Any failure by centres to provide this Observation Statement will be treated as malpractice and/or maladministration. It is important to realise that these mandatory observations are the minimum number of observations that should be taken during the course. Safety is an overriding requirement for all observational work. Centres are responsible for ensuring appropriate safety procedures are followed whenever their students complete observational activities. Pearson may review and amend these observational activities if necessary. Centres will be told as soon as possible about any changes to them. Skills Astronomical observation is an iterative cycle of design, observation, analysis and evaluation. Through the evolution of each set of observations, students suggest improvements that form the foundation of the design of the next set of observations. Astronomical observations require students to: 1 Design observations 2 Make observations 3 Analyse observations 4 Evaluate observations. 42 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 1 Design observations There are many uncontrollable variables in astronomical observations and reliability is improved by iteratively refining the observation programme. All astronomical observations require the informed selection of target object, observing site, time and date along with their choice of observing equipment. Students should, therefore, be involved in selecting these features of their observing programme, as well as refining them. Students should: a produce a list of feasible target objects, location, date, time and observing instrument, as appropriate to their chosen task b use astronomical data to select the most appropriate target object, location, date, time or observing instrument c generate an initial observing programme that will allow them to solve the problem posed by the title of their chosen task, including health and safety considerations d make refinements or improvements to their observing programme, following the results of initial trials. 2 Make observations There are many variables affecting astronomical observations which are outside the control of the observer. Students will need to undertake a series of observations in order to generate sufficient data to support valid conclusions. This is the observational programme. Students should gain experience of undertaking an observational programme in both unaided (‘naked eye’) and aided situations, as follows: a conduct unaided observations, using techniques such as averted vision, dark adaptation b conduct aided observations, using equipment such as binoculars, telescopes and cameras c ensure that all observations are accompanied by the necessary observational details, including: i. date ii. time iii. location iv. seeing conditions v. optical instruments used d ensure that sufficient observations are taken to produce accurate data for the specific task. 3 Analyse observations Students will need to analyse their observations to produce reliable and valid conclusions for the specific observation. This will involve a wide range of skills, depending on the nature of the original observations, as follows: a identify patterns or trends from a series of drawings or photographs b present numerical data in the form of graphs or charts c perform calculations d perform basic digital image processing, including the adjustment of image brightness, dynamic range and the use of false colour. Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 43 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 4 Evaluate observations Students will need to compare the results of their observations with those obtained by professional astronomers or with accepted values. This will enable them to evaluate the reliability and accuracy of their resulting conclusions and suggest improvements for further observations. This should include the following: a compare the results of their observations with professional images or accepted values in order to assess their accuracy b where possible, calculate a quantitative assessment of their accuracy c identify the effects of light pollution on naked-eye observations d identify the effects of light pollution, exposure time and filtering on photographic observations e recognise some of the major artefacts that can affect astronomical images, such as scattered light, diffraction spikes, cosmic rays and trails from satellites, aircraft or meteors f identify the major causes of error in the conclusions g suggest and implement improvements to the observing programme. 44 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Observational tasks Each of the following observational tasks sets out a problem, which can be solved by a programme of observations. Completion of these tasks will give students an understanding of the cycle of astronomical observation and help them to develop the key observational skills. Centres must ensure that each student completes at least one unaided and one aided observation task from the following list. Students may not select both of their observational tasks (unaided and aided) from the same row on the observational task table. For example, not A1 and B1. Unaided tasks Aided tasks A1 Demonstrate the changing B1 Demonstrate the changing appearance of lunar features appearance of lunar features Use a series of naked-eye drawings Use a series of telescopic drawings of individual lunar features to or photographs of individual lunar demonstrate their changing features to demonstrate their appearance during the lunar changing appearance during the phase cycle lunar phase cycle A2 Finding the radiant point of a B2 Finding the radiant point of a meteor shower meteor shower Use naked-eye drawings of the Use photographs of the paths of paths of meteors to determine the meteors to determine the radiant radiant point of a meteor shower point of a meteor shower A3 Assess the accuracy of stellar B3 Assess the accuracy of stellar magnitude estimates magnitude measurements Using reference stars, estimate the Using reference stars, estimate the magnitude of a range of stars from magnitude of a range of stars from naked-eye observations and thus photographs and thus assess the assess the accuracy of this accuracy of this technique technique A4 Estimate a celestial property B4 Measure a celestial property using drawings of a suitable using telescopic drawings or event photographs of a suitable event Use naked-eye drawings or Use telescopic drawings, measurements of a celestial event measurements or photographs of a such as a comet or eclipse to celestial event such as a comet, determine a celestial property such transit, eclipse or occultation to as the relative size of the Earth and determine a celestial property such Moon as the Earth-Sun distance or the orbital period of a Jovian satellite A5 Estimating levels of light B5 Measuring levels of light pollution pollution Use estimates of the magnitude of Use estimates of the magnitude of the faintest stars visible with the the faintest stars visible on naked eye to conduct a survey of photographs to conduct a survey of the astronomical effects of light the astronomical effects of light pollution in an area pollution in an area Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 45 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024  Unaided tasks Aided tasks A6 Estimate the solar rotation B6 Determine the solar rotation period using drawings of period using photographs of sunspots sunspots Use a series of drawings from Use a series of photographs or pinhole projections of sunspots to drawings from telescopic projections estimate the length of the Sun’s of sunspots to estimate the length of average rotation period the Sun’s average rotation period A7 Estimating the period of a B7 Measuring the period of a variable star variable star Use estimates of stellar magnitude Use estimates of stellar magnitude from naked-eye observations to from telescopic observations or produce a light curve for a variable photographs to produce a light star and thus estimate its period curve for a variable star and thus estimate its period A8 Comparing stellar density B8 Comparing stellar density estimates measurements Use naked-eye estimates of stellar Use telescopic measurements of density taken in and outside the stellar density taken in and outside plane of the Milky Way to estimate the plane of the Milky Way to their relative sizes estimate their relative sizes A9 Finding longitude using a N/A shadow stick Use measurements of shadow length around local noon to estimate the observer’s longitude A10 Assess the accuracy of a sundial N/A Use a log of sundial and clock times to assess the accuracy of a sundial N/A B11 Demonstrate the range of objects in the Messier Catalogue Use detailed drawings or photographs of objects from the Messier Catalogue to demonstrate the range of different objects it contains N/A B12 Calculation of the length of the sidereal day Use long-exposure photographs of the area around the celestial pole to produce an accurate measurement of the length of the Earth’s sidereal period 46 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Assessment Objectives Students must: % in GCSE AO1 Demonstrate knowledge and understanding of: 40 scientific ideas scientific techniques and procedures. AO2 Apply knowledge and understanding of: 40 scientific ideas scientific techniques and procedures. AO3 Analyse information and ideas to: 20 interpret and evaluate astronomical observations, data and methods make judgements and draw conclusions develop and improve observational procedures Total 100% Breakdown of Assessment Objectives Assessment Objectives Total for all Assessment Paper AO1 % AO2 % AO3 % Objectives Paper 1: Naked-eye Astronomy 20 20 10 50% Paper 2: Telescopic Astronomy 20 20 10 50% Total for GCSE 40% 40% 20% 100% Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 47 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 3 Administration and general information Entries Details of how to enter students for the examinations for this qualification can be found in our UK Information Manual. A copy is made available to all examinations officers and is available on our website: qualifications.pearson.com Discount code and performance tables Centres should be aware that students who enter for more than one GCSE, or other Level 2 qualifications with the same discount code, will have only the grade for their 'first entry' counted for the purpose of the school and college performance tables (please see Appendix 8: Codes). For further information about what constitutes 'first entry' and full details of how this policy is applied, please refer to the DfE website: www.gov.uk/government/organisations/department-for-education Students should be advised that if they take two GCSEs with the same discount code, the schools and colleges to which they wish to progress are likely to take the view that this achievement is equivalent to only one GCSE. The same view may be taken if students take two GCSEs or other Level 2 qualifications that have different discount codes but which have significant overlap of content. Before embarking on their programmes, students or their advisers who have any doubts about their subject combinations should check with the institution to which they wish to progress. Access arrangements, reasonable adjustments, special consideration and malpractice Equality and fairness are central to our work. Our equality policy requires all students to have equal opportunity to access our qualifications and assessments, and our qualifications to be awarded in a way that is fair to every student. We are committed to making sure that: students with a protected characteristic (as defined by the Equality Act 2010) are not, when they are undertaking one of our qualifications, disadvantaged in comparison to students who do not share that characteristic all students achieve the recognition they deserve for undertaking a qualification and that this achievement can be compared fairly to the achievement of their peers. Language of assessment Assessment of this qualification will be available in English. All student work must be in English. 48 Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Access arrangements Access arrangements are agreed before an assessment. They allow students with special educational needs, disabilities or temporary injuries to: access the assessment show what they know and can do without changing the demands of the assessment. The intention behind an access arrangement is to meet the particular needs of an individual student with a disability, without affecting the integrity of the assessment. Access arrangements are the principal way in which awarding bodies comply with the duty under the Equality Act 2010 to make ‘reasonable adjustments’. Access arrangements should always be processed at the start of the course. Students will then know what is available and have the access arrangement(s) in place for assessment. Reasonable adjustments The Equality Act 2010 requires an awarding organisation to make reasonable adjustments where a person with a disability would be at a substantial disadvantage in undertaking an assessment. The awarding organisation is required to take reasonable steps to overcome that disadvantage. A reasonable adjustment for a particular person may be unique to that individual and therefore might not be in the list of available access arrangements. Whether an adjustment will be considered reasonable will depend on a number of factors, including: the needs of the student with the disability the effectiveness of the adjustment the cost of the adjustment; and the likely impact of the adjustment on the student with the disability and other students. An adjustment will not be approved if it involves unreasonable costs to the awarding organisation, or affects timeframes or the security or integrity of the assessment. This is because the adjustment is not ‘reasonable’. Special consideration Special consideration is a post-examination adjustment to a student's mark or grade to reflect temporary injury, illness or other indisposition at the time of the examination/ assessment, which has had, or is reasonably likely to have had, a material effect on a candidate’s ability to take an assessment or demonstrate their level of attainment in an assessment. Further information Please see our website for further information about how to apply for access arrangements and special consideration. For further information about access arrangements, reasonable adjustments and special consideration, please refer to the JCQ website: www.jcq.org.uk. Pearson Edexcel Level 1/Level 2 GCSE (9–1) in Astronomy 49 Specification – Issue 3 – December 2024 © Pearson Education Limited 2024 Malpractice Candidate malpractice Candidate malpractice refers to any act by a candidate that compromises or seeks to compromise the process of assessment or which undermines the integrity of the qualifications or the validity of results/certificates. Candidate malpractice in examinations must be reported to Pearson using a JCQ Form M1 (available at www.jcq.org.uk/exams-office/malpractice). The form can be emailed to [email protected] or posted to Investigations Team, Pearson, 190 High Holborn, London, WC1V 7BH. Please provide as much information and supporting documentation as possible. Note that the final decision regarding appropriate sanctions lies with Pearson. Failure to report malpractice constitutes staff or centre malpractice. Staff/centre malpract