2023 Sydney Grammar School Form III Science PDF

ANNUAL EXAMINATION 2023 FORM III SCIENCE General Instructions Monday 30 Oct Working Time: 2 hours Write using black pen...

ANNUAL EXAMINATION 2023 FORM III SCIENCE General Instructions Monday 30 Oct Working Time: 2 hours Write using black pen Session A Remove the central staple at the start of the examination. Checklist Each boy should have the following: At the end of the examination, hand in all parts of the paper in the order ☐ 1 examination paper below. ☐ 1 formula sheet and Periodic Table Write your name and class number at ☐ 1 multiple choice answer sheet the top of each section. Structure of Paper & Instructions T Wallis Multiple Choice (16 marks) Disease (23 marks) Optics (24 marks) Chemical Reactions II (23 marks) Electrical Circuits II (24 marks) Total marks: 110 CLASS 1 2 3 4 5 6 7 8 9 10 NUMBER Class 3SC101 3SC102 3SC103 3SC104 3SC105 3SC106 3SC107 3SC108 3SC109 3SC110 Master’s Initials PCK TW FHB MTK ILM AKBB HCKM ED FEML JLS Master’s Dr Knight Mr Wallis Ms Branch Mrs Kelso Mrs Mendes Mr Bowes Dr McCarron Mr Dervis Ms Lee Dr Senczyszyn Name PART A: MULTIPLE CHOICE Attempt ALL Questions Use the Multiple-Choice Answer Sheet. 1. Which of the following is an example of a non-infectious disease? (A) AIDS (B) Cholera (C) Influenza (D) Lung cancer 2. The diagram below shows a microbe. What type of microbe is this? (A) Virus (B) Bacterium (C) Fungus (D) Protozoa 3. When a pathogen enters the bloodstream of the human body the immune system has the capability to destroy the pathogen. How does the immune system destroy the pathogen? (A) Platelets stick to the pathogen. (B) Macrophages engulf the pathogen. (C) Red blood cells kill the pathogen. (D) Inflammation causes the pathogens to burst. Page 3 Sydney Grammar School Form III Science 2023 Annual Examination 4. Doctors investigated the spread of the virus that causes chickenpox. The first symptom of chickenpox after exposure to the virus is spots on the body. 23 children were playing together at a party. On the day of the party one of the children developed chickenpox spots. Every two days after the party, the doctors recorded when the other 22 children first showed chickenpox spots. The table below shows the results. Which of the following statements is correct? (A) Children with no spots must be immune to the virus. (B) Incubation time for the virus is approximately 2 weeks. (C) The child with chickenpox at the party was not infectious. (D) The children who didn’t show any spots were treated with antibiotics. Page 4  Sydney Grammar School Form III Science 2023 Annual Examination 5. Tetanus is a bacterial infection caused by Clostridium tetani, which lives mainly in soil, dust and manure, but can be found anywhere. You can become infected if the bacterium enters your bloodstream through an open wound. Around 1 in 10 people who get the disease will die from it. Which of the following is the best strategy for preventing tetanus infections? (A) Social distancing (B) Washing wounds with soap (C) Quarantining people with tetanus (D) Treating suspected cases of tetanus with antibiotics 6. A person approaches a plane mirror at 2 m/s. How fast do they approach their image in the mirror? (A) 1 m/s (B) 2 m/s (C) 4 m/s (D) 8 m/s 7. An observer views the image of an object O in a plane mirror. Which ray diagram correctly represents this scenario? A B C D Page 5 Sydney Grammar School Form III Science 2023 Annual Examination 8. A lens forms a blurred image of an object on a screen. How can the image be focussed on the screen? (A) By moving the object away from the lens and screen. (B) By moving the screen away from lens and object. (C) By using a lens of shorter focal length at the same position. (D) By using a lens of longer focal length at the same position. 9. Light hits a plane mirror and is reflected as shown. What is the angle of incidence and the angle of reflection? Angle of Incidence (°) Angle of Reflection (°) (A) 40 40 (B) 40 50 (C) 50 40 (D) 50 50 Page 6 Sydney Grammar School Form III Science 2023 Annual Examination 10. Which of the following compounds is soluble in water? (A) Pb(CH3COO)2 (B) PbCO3 (C) PbI2 (D) PbSO4 11. What is the formula for aluminium nitrate? (A) AlNO4 (B) Al(NO3)3 (C) Al2(NO3)3 (D) Al3(NO3)2 12. Which of the following metals will displace zinc metal from an aqueous solution of zinc nitrate? (A) copper (B) magnesium (C) silver (D) tin 13. What is the unit of electrical charge? (A) Ampere (B) Coulomb (C) Volt (D) Watt Page 7 Sydney Grammar School Form III Science 2023 Annual Examination 14. In the circuit below, the meter reads 3.2 V. 8V X 15 Ω 3.2 V What is the resistance of Resistor X? (A) 1.7 Ω (B) 2.5 Ω (C) 4.8 Ω (D) 10.0 Ω 15. Calculate the total electrical power used by the circuit shown below. 9V 2A X 3A Y (A) 1.8 W (B) 7.5 W (C) 45 W (D) 225 W Page 8 Sydney Grammar School Form III Science 2023 Annual Examination 16. When the variable resistor in the circuit shown below is adjusted, the reading on the ammeter varies from 2.0 A to 4.5 A. 12 V A a 8Ω Calculate the minimum resistance of the variable resistor. (A) 2.0 Ω (B) 2.67 Ω (C) 4.0 Ω (D) 24 Ω Page 9 Sydney Grammar School Form III Science 2023 Annual Examination Blank page Page 10 PART B: DISEASE (23 marks) NAME CLASS NUMBER Answer the questions in the spaces provided. Show all relevant working in questions involving calculations. Question 17 (2 marks) Marks A number of diseases are caused by a lack of certain nutrients in the diet. Identify the cause and outline a symptom of one nutritional disease. 2 …………………………………………………………………………………………………… …………………………………………………………………………………………………… …………………………………………………………………………………………………… Question 18 (2 marks) The body has three natural lines of defence against pathogens. The first line of defence comprises physical and chemical barriers to the pathogen entering the tissues of the body. Describe how one physical barrier and one chemical barrier prevent entry of pathogens. 2 …………………………………………………………………………………………………… …………………………………………………………………………………………………… …………………………………………………………………………………………………… …………………………………………………………………………………………………… Page 11 Sydney Grammar School Form III Science 2023 Annual Examination Question 19 (4 marks) Marks A student investigated the effectiveness of three different antibiotics on one species of bacteria. The figure below shows how the student set up an agar plate. (a) Outline one aspect of the plate set-up required to ensure that this is a fair test. 1 ………………………………………………………………………………………… ………………………………………………………………………………………… Question 19 continued on next page. Page 12 Sydney Grammar School Form III Science 2023 Annual Examination Question 19 continued: The student placed the agar plate in an incubator at 25 °C for 48 hours. The figure below shows the agar plate after 48 hours. (b) What measurement would the student need to take to determine the effectiveness of the antibiotics? 1 ………………………………………………………………………………………… ………………………………………………………………………………………… (c) If a patient was suffering from an infection with this bacteria, which antibiotic would you recommend for treatment and why? 2 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Page 13 Sydney Grammar School Form III Science 2023 Annual Examination Question 20 (4 marks) Marks A survey of emergency department (ED) visits by 5-17 years-olds with traumatic brain injury was conducted over an 18-year period. Three contact sports were considered and data from St Vincent’s Hospital in Sydney is shown below. (a) Describe two trends observed. 2 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… (b) An epidemiologist concluded that there is a direct link between playing contact sports and traumatic head injuries. Outline TWO ways in which this study could be improved. 2 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Page 14 Sydney Grammar School Form III Science 2023 Annual Examination Question 21 (11 marks) Marks Whooping cough is a bacterial infection caused by Bordetella pertussis. It spreads when an infected person coughs or sneezes and you breathe it in. The bacteria affect the lungs and airways, causing a person to cough violently and uncontrollably. This can make it hard for the infected person to breathe. A vaccine is given to infants at eight-weeks of age. The diagram below shows an immune response to a Bordetella pertussis infection. Antigen binding Antibodies released No antigen binding (a) Why does the Bordetella pertussis antigen bind to Cell 1 but not to Cell 2? 1 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Question 21 continued on next page. Page 15 Sydney Grammar School Form III Science 2023 Annual Examination Question 21 continued: An infant’s immune response for whooping cough is shown below. (b) Compare and explain the two peaks in the graph. 4 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Question 21 continued on next page. Page 16 Sydney Grammar School Form III Science 2023 Annual Examination Question 21 continued: In 2017 there was a whooping cough outbreak in a regional area of Australia. The table shows the number of new cases of whooping cough from April to December 2017. Month Number of new cases of whooping cough April 22 June 64 August 120 October 160 December 81 (c) Graph the data in the table on the grid below. 3 (d) Suggest reasons that would account for the shape of the graph. 3 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Page 17 Sydney Grammar School Form III Science 2023 Annual Examination Blank page Page 18 PART C: OPTICS (24 marks) NAME CLASS NUMBER Answer the questions in the spaces provided. Show all relevant working in questions involving calculations. Question 22 (2 marks) Marks Rays from a ray box pass through three lenses placed at positions 1, 2 and 3, as shown below. What type of lens, converging or diverging, is used at each position? 2 Position 1: ____________________________ Position 2: ____________________________ Position 3: ____________________________ Page 19 Sydney Grammar School Form III Science 2023 Annual Examination Question 23 (4 marks) A student is using a convex lens to examine an object. (a) Add rays to the diagram to show how and where an image is formed. 2 (b) Describe the image. 2 ………………………………………………………………………………………… Page 20 Sydney Grammar School Form III Science 2023 Annual Examination Question 24 (8 marks) Marks (a) Fill in the table showing the name and function of the indicated parts of the eye. 3 B A C Part Name Function A B C (b) Suggest two ways in which the image formed by an eye is different from the image formed in a plane mirror. 2 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… (c) A person is suffering from myopia (short-sightedness). Add light rays to the diagram of the eye above to show where the image of a distant object may form, and suggest below how a lens might be used to correct this condition. 3 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Page 21 Sydney Grammar School Form III Science 2023 Annual Examination Question 25 (6 marks) Marks (a) Complete the ray diagram to show the formation of an image. 3 C F F C (b) The diagram below shows the image formed by a lens. Draw rays to show the size and location of the object for that image. 3 C F F C Page 22 Sydney Grammar School Form III Science 2023 Annual Examination Question 26 (4 marks) Marks Glass can be made with varying concentration of magnesium oxide, MgO, and this affects the refractive index of the glass. The table below shows the refractive index of glass made with different concentrations of MgO. (a) What is the refractive index of glass with 20% MgO? 1 ………………………………………………………………………………………… Question 26 continued on next page. Page 23 Sydney Grammar School Form III Science 2023 Annual Examination Question 26 continued: The larger the refractive index, the larger the difference between the angle of refraction and the angle of incidence. The diagram below shows a ray of light labelled P, Q and R entering and then leaving a prism made with 20% MgO. Q 𝜃𝜃 R glass (b) What would happen to the position of point Q and the size of the angle 𝜃𝜃 if the concentration of MgO was smaller? Explain your answer. 3 ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Page 24 PART D: CHEMICAL REACTIONS II (23 marks) NAME CLASS NUMBER Answer the questions in the spaces provided. Show all relevant working in questions involving calculations. Question 27 (2 marks) Marks Complete the following table: Formula Name FeCl3 zinc carbonate 2 Question 28 (2 marks) Name the precipitate formed (if any) when aqueous solutions of the following compounds are mixed. If there is no precipitate formed, write “no reaction”. lead(II) nitrate and zinc acetate................................................................................................................................... 1 lithium sulfate and barium bromide................................................................................................................................... 1 Page 25 Sydney Grammar School Form III Science 2023 Annual Examination Question 29 (6 marks) Marks Write balanced chemical equations for the reactions that occur when the following chemicals are mixed. magnesium metal and tin(II) sulfate solution................................................................................................................................... 2 copper(II) sulfate solution and potassium hydroxide solution................................................................................................................................... 2 potassium carbonate solution and silver nitrate solution................................................................................................................................... 2 Page 26 Sydney Grammar School Form III Science 2023 Annual Examination Question 30 (4 marks) Marks For each pair of chemicals below, identify an aqueous solution you could use to differentiate between aqueous solutions of the following chemicals. Include expected observations in your answer; balanced chemical equations are not required. lead(II) nitrate and barium nitrate................................................................................................................................... 2......................................................................................................................................................................................................................................................................................................................................................................................................... copper(II) nitrate and copper(II) chloride................................................................................................................................... 2......................................................................................................................................................................................................................................................................................................................................................................................................... Page 27 Sydney Grammar School Form III Science 2023 Annual Examination Question 31 (5 marks) Marks Recall that when solid lithium is added to water, it reacts to form lithium hydroxide and hydrogen gas. When solid lithium is added to a solution of copper(II) sulfate solution, an interesting phenomenon is observed: a red-brown solid and a light blue solid both precipitate from solution. Explain what these products are and how they are produced. You may use word or balanced chemical equations to support your answer, but they are not required.................................................................................................................................... 3............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Identify a metal that could react with an aqueous solution of copper(II) sulfate to produce only solid copper and a metal sulfate.................................................................................................................................... 1 Write a balanced chemical equation for the reaction of the metal identified in part (a) with an aqueous solution of copper(II) sulfate.................................................................................................................................... 1 Page 28 Sydney Grammar School Form III Science 2023 Annual Examination Question 32 (4 marks) Marks A pupil was asked to prepare a pure sample of solid copper(II) hydroxide and a pure sample of magnesium carbonate. They were given the following reagents: aqueous copper(II) sulfate solution aqueous potassium hydroxide solution solid copper(II) carbonate solid magnesium solid sodium carbonate deionised water Outline how a pupil could prepare a pure sample of solid copper(II) hydroxide and a pure sample of magnesium carbonate. Balanced chemical equations are not required in your answer. ………………………………………………………………………………………………….. 4 ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. Page 29 Sydney Grammar School Form III Science 2023 Annual Examination Blank page Page 30 PART E: ELECTRICAL CIRCUITS (24 marks) NAME CLASS NUMBER Answer the questions in the spaces provided. Show all relevant working in questions involving calculations. Question 33 (2 marks) Marks Calculate the total resistance of the resistor combinations shown below: (a) ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. (b) ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. Page 31 Sydney Grammar School Form III Science 2023 Annual Examination Question 34 (4 marks) Marks Calculate the readings on the ammeters and voltmeters in the circuits shown below: (a) 12 V 2 …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… (b) 20 V 2 …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… Page 32 Sydney Grammar School Form III Science 2023 Annual Examination Question 35 (3 marks) Marks The heating element of an electric kettle is basically a wire with a high resistance that gets hot when a current is passed through it. Mr Jones owns a kettle that is rated as “240 V, 2000 W”. Every morning he turns it on for 45 s to make a pot of tea. (a) What is the resistance of the heating element inside the kettle? 1 …………………………………………………………………………………………… …………………………………………………………………………………………… (b) What current flows through the kettle when it is turned on? 1 …………………………………………………………………………………………… …………………………………………………………………………………………… (c) How much electrical energy does the kettle use when it is switched on for 45 s? 1 …………………………………………………………………………………………… …………………………………………………………………………………………… Page 33 Sydney Grammar School Form III Science 2023 Annual Examination Question 36 (6 marks) Marks The diagram below shows an electrical circuit. For the circuit shown, calculate: (a) The total resistance of the circuit. 2 …………………………………………………………………………………………… …………………………………………………………………………………………… (b) The current through the battery. 1 …………………………………………………………………………………………… …………………………………………………………………………………………… (c) The voltage across the 8 Ω resistor. 1 …………………………………………………………………………………………… …………………………………………………………………………………………… (d) The current through the 9 Ω resistor. 2 …………………………………………………………………………………………… …………………………………………………………………………………………… Page 34 Sydney Grammar School Form III Science 2023 Annual Examination Question 37 (3 marks) Marks During a practical examination, a boy is given the following instructions for setting up an electrical circuit: Use a 10 V battery. Connect a 12 Ω and an 8 Ω resistor together in series and connect the battery across them. Add a 16 Ω resistor in parallel with the 12 Ω resistor only. Add a meter to measure the potential difference across the 8 Ω resistor. Add a meter to measure the current through the 16 Ω resistor only. Add a switch that stops any current from flowing through the circuit when it is open (i.e. not pressed closed). Draw a fully labelled, correct circuit based on these instructions. 3 Page 35 Sydney Grammar School Form III Science 2023 Annual Examination Question 38 (6 marks) Marks A student has two unknown resistors, X and Y. She sets up the circuit shown below, to investigate the effect of changing the battery voltage on the current flowing in the circuit. She plots her results on graph paper, as shown below. 16 14 12 Reading on Voltmeter (V) 10 8 6 4 2 0 0 1 2 3 4 5 6 Reading on Ammeter (A) Question 38 continued on next page. Page 36 Sydney Grammar School Form III Science 2023 Annual Examination Question 41 continued: (a) What is the voltage when the current flowing in the circuit is 4 A? 1 …………………………………………………………………………………………… …………………………………………………………………………………………… (b) Determine the total resistance of the circuit. 2 …………………………………………………………………………………………… …………………………………………………………………………………………… Resistor X has a resistance double that of resistor Y. (c) Calculate the values of the resistors X and Y. 2 …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… The student now connects resistors X and Y in series, as shown. (d) Draw a line on the graph to represent the effect of changing the battery voltage on the current flowing in this new circuit. 1 Page 37 Sydney Grammar School Form III Science 2023 Annual Examination END OF EXAMINATION Page 38 Sydney Grammar School Form III Science 2023 Annual Examination You may detach this page from your paper. Junior Science Data Sheet Simple Solubility Rules 1. All Group I and ammonium salts are soluble. 2. All nitrates and acetates are soluble. 3. All chlorides, bromides and iodides are soluble except those of Ag and Pb. 4. All sulfates are soluble except those of Ba, and Pb, Ag (slightly) and Ca (slightly). 5. All hydroxides are insoluble except those of the very active metals (i.e. all of Group I and Ca, Sr, Ba and Ra from Group II). 6. All carbonates are insoluble except Rule 1. Activity Series of Metals K Na Ba Ca Mg Al Zn Fe Ni Sn Pb (H2) Cu Ag Au Decreasing activity Page 39  Periodic Table of the Elements C Br He Tc hydrogen helium solid liquid gas synthetic 1 2 H He 1 4 lithium beryllium element name boron carbon nitrogen oxygen fluorine neon key 3 4 atomic number 5 6 7 8 9 10 Li Be symbol B C N O F Ne 7 9 atomic weight 11 12 14 16 19 20 sodium magnesium aluminium silicon phosphorus sulfur chlorine argon 11 12 13 14 15 16 17 18 Na Mg Al Si P S Cl Ar 23 24 27 28 31 32 35.5 40 potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 39 40 45 48 51 52 55 56 59 59 63.5 65 70 73 75 79 80 84 rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 85 88 89 91 93 96 101 103 106 108 112 115 119 122 128 127 131 caesium barium lutetium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon 55 56 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Cs Ba Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 133 137 175 178.5 181 184 186 190 192 195 197 201 204 207 209 francium radium lawrencium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium ununbium 87 88 103 104 105 106 107 108 109 110 111 112 Fr Ra Lr Rf Db Sg Bh Hs Mt Ds Rg Uub lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium 57 58 59 60 61 62 63 64 65 66 67 68 69 70 La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb 138.9055 140.116 140.90765 144.24 150.36 151.964 157.25 158.9253 162.50 164.930 167.259 168.934 173.04 actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium 89 90 91 92 93 94 95 96 97 98 99 100 101 102 Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No 232.038 231.0359 238.0289 Page 40  Back of Multiple Choice Answer Sheet Page 41  Class Name 2023 Multiple Choice FORM III ANSWER SHEET ANNUAL EXAMINATION 1 A B C D Instructions Write your Name and Class in the 2 A B C D space provided. Attempt all questions 3 A B C D Use a blue or black pen 4 A B C D 5 A B C D 6 A B C D Select the alternative A, B, C, or D that best answers the question. Fill in the response circle 7 A B C D completely. Example 8 A B C D 1 A B C D If you think you have made a mistake, put a cross 9 A B C D through the incorrect answer and fill in the new answer. 10 A B C D 1 A B C D 11 A B C D If you change your mind and have crossed out what you consider to be the correct answer, then indicate the correct answer by writing the word 12 A B C D correct and drawing an arrow as follows. correct 13 A B C D 1 A B C D 14 A B C D 15 A B C D 16 A B C D Page 42