Physics of Matter and Its Properties
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Questions and Answers

What was a primary conviction of the individual discussed in the passage?

  • The Addis Ababa City Government should invest more in teacher training programs.
  • Addis Ababa City Government School teachers should play a significant role in textbook and teacher guide development. (correct)
  • Teachers should focus on improving their teaching skills.
  • The development of textbooks and teacher guides should prioritize the needs of students.

    • The passage suggests that the individual's influence was limited to the Addis Ababa City Government School teachers.

    False (B)

    What kind of support did the school principals provide to the textbook writers?

    The school principals allowed the textbook writers to focus on material preparation by freeing them from their regular teaching duties and provided consistent moral support.

    The individual's ______ and dedication to the task inspired all involved.

    <p>unabated inspiration</p> Signup and view all the answers

    Match the following individuals with their roles:

    <p>Ato Admasu Dechasa = Deputy Head of the Curriculum Division Ato Dagnew Gebru = Deputy Head of Education Technology Ato Samson Melese = Deputy Head of Teacher Development Division W/ro Abebech Negash = Bureau Head Advisor Ato Desta Mersha = Bureau Technical Advisor Ato Sisay Endale = Head of Education Bureau Office</p> Signup and view all the answers

    What is the arrangement of particles in gases?

    <p>Disorderly arranged and very far apart (D)</p> Signup and view all the answers

    Solids have a definite shape and volume.

    <p>True (A)</p> Signup and view all the answers

    What is the primary motion of particles in liquids?

    <p>Flow together in random motion</p> Signup and view all the answers

    Gases are highly ____ and can easily change their volume.

    <p>compressible</p> Signup and view all the answers

    Which of the following statements is true regarding the compressibility of solids?

    <p>Solids are not compressible (A)</p> Signup and view all the answers

    Match the phase of matter with its property:

    <p>Gases = Flow freely and move randomly Liquids = Have no definite shape but have a definite volume Solids = Have a definite shape and volume</p> Signup and view all the answers

    Liquids do not move at all.

    <p>False (B)</p> Signup and view all the answers

    What distinguishes the arrangement of particles in solids from gases?

    <p>Particles in solids are orderly arranged, while particles in gases are disorderly arranged and far apart.</p> Signup and view all the answers

    Which of the following properties is classified as an intensive physical property?

    <p>Color (D)</p> Signup and view all the answers

    Melting point is an extensive physical property.

    <p>False (B)</p> Signup and view all the answers

    What happens to ice kept in a cup in a classroom when heated?

    <p>It melts and converts to water.</p> Signup and view all the answers

    The sense organs that help us detect color, odor, and taste are the ______.

    <p>eyes, nose, and tongue</p> Signup and view all the answers

    Match the physical properties with their characteristic:

    <p>Density = Intensive property Length = Extensive property Melting Point = Intensive property Volume = Extensive property</p> Signup and view all the answers

    Which property can be recognized directly by the sense of smell?

    <p>Odor (C)</p> Signup and view all the answers

    How would you describe the taste of lemon?

    <p>Sour</p> Signup and view all the answers

    All physical properties vary from sample to sample.

    <p>False (B)</p> Signup and view all the answers

    What happens when a magnet is brought close to a mixture of iron and sulfur?

    <p>The iron is attracted to the magnet (C)</p> Signup and view all the answers

    The properties of a compound are the same as the properties of its component elements.

    <p>False (B)</p> Signup and view all the answers

    What was the ratio by mass of iron powder to sulfur powder in the mixture prepared?

    <p>7:4</p> Signup and view all the answers

    In the experiment, the product formed from the heating of iron and sulfur is called _____ sulfide.

    <p>iron (II)</p> Signup and view all the answers

    Match the components with their description:

    <p>Iron = Can be separated using a magnet Sulfur = Non-magnetic component Mixture = Contains both iron and sulfur in a physical combination Compound = Result of heating the mixture</p> Signup and view all the answers

    Which of the following materials is NOT required for the compound and mixture experiment?

    <p>Glass beaker (A)</p> Signup and view all the answers

    A compound can be separated into its elements using physical means.

    <p>False (B)</p> Signup and view all the answers

    What visual observation indicates a chemical reaction during the heating of the mixture?

    <p>An orange glow</p> Signup and view all the answers

    What did Marie Curie discover?

    <p>Polonium and radium (C)</p> Signup and view all the answers

    Isaac Newton discovered the elements polonium and radium.

    <p>False (B)</p> Signup and view all the answers

    What is the significance of Dr. Aklilu Lemma's discovery?

    <p>He discovered a natural treatment for schistosomiasis.</p> Signup and view all the answers

    Albert Einstein developed the __________ theory.

    <p>special relativity</p> Signup and view all the answers

    Which scientist was known for discovering the laws of motion?

    <p>Isaac Newton (D)</p> Signup and view all the answers

    Prof. Yalemtsehay Mekonnen was the first female professor at Addis Ababa University.

    <p>True (A)</p> Signup and view all the answers

    What did Michael Faraday discover?

    <p>The generation of electricity from magnetism.</p> Signup and view all the answers

    Match the following scientists with their discoveries or contributions:

    <p>Marie Curie = Polonium and radium Isaac Newton = Laws of motion Michael Faraday = Electricity generation from magnetism Albert Einstein = Special relativity theory</p> Signup and view all the answers

    What is the formula for calculating density?

    <p>Density = Mass / Volume (D)</p> Signup and view all the answers

    Flammability is considered a physical property of matter.

    <p>False (B)</p> Signup and view all the answers

    Give two examples of chemical properties.

    <p>Flammability and reactivity</p> Signup and view all the answers

    The unit of density is ______.

    <p>kilogram per cubic meter (kg/m3)</p> Signup and view all the answers

    Match the following properties with their type:

    <p>Density = Physical Property Flammability = Chemical Property Reactivity = Chemical Property Conductivity = Physical Property</p> Signup and view all the answers

    Which of the following is a characteristic of a physical property?

    <p>It does not change the chemical nature of the substance. (C)</p> Signup and view all the answers

    Electrical conductivity is a property characteristic of non-metallic substances.

    <p>False (B)</p> Signup and view all the answers

    Explain how chemical properties of a substance can be investigated.

    <p>By altering its internal structure</p> Signup and view all the answers

    Study Notes

    General Science Grade 7 Textbook

    • Textbook is a property of the school
    • Take good care of the book
    • Cover the book with protective materials like plastic, old newspapers or magazines
    • Keep the book in a clean, dry place
    • Be sure your hands are clean when using the book
    • Do not write on the cover or inside pages
    • Use a piece of paper or cardboard as a bookmark
    • Never tear or cut out any pictures or pages
    • Repair any torn page with paste or tape
    • Pack the book carefully when placing it in your school bag
    • Handle the book with care when passing it to another person
    • When using a new book for the first time, lay it flat and press lightly along the bound edge as you turn the pages.

    Table of Contents

    • Unit 1: Basic Concepts of Science
      • 1.1 The Nature of Science and its Branches
      • 1.2 Common Laboratory Equipment, Uses, Safety Rules and Procedures in Science Laboratories
      • Review Exercise
    • Unit 2: Matter in Our Surrounding
      • 2.1 Characteristics and Nature of Matter
      • 2.2 Physical and Chemical Properties of Matter
      • 2.3 Classification of Substances
      • 2.4 Changes around us: Physical and Chemical Changes
      • 2.5 Separation of Mixtures and its Application
      • Review Exercise
    • Unit 3: Elements, Compound and Chemical Reaction
      • 3.1 Elements and their representation
      • 3.2 Compounds and their representation
      • 3.3 Simple chemical reactions and equations
      • 3.4 Uses Of Chemical Reactions in Every Day Situation
      • Review Exercise
    • Unit 4: Cell as the Basis of Life
      • 4.1 Microscope
      • 4.2 Cell
      • Review Exercise
    • Unit 5: Living Things and Their Diversity
      • 5.1 Living Things
      • 5.2 The kingdom of life
      • Review Exercise
    • Unit 6: Earth in Space
      • 6.1 Shape and Dimensions of the Earth
      • 6.2 Parts of the Earth (Body and Atmosphere)
      • 6.3 Earth's movements
      • 6.4 Earth System and Cycles
      • Review Exercise
    • Unit 7: Motion, Force, Energy And Energy Resources
      • 7.1 Definition and Types of Motion
      • 7.2 Definition of Force and Gravitational Force
      • 7.3 Effects of Force
      • 7.4 Measuring Forces
      • 7.5 Definition of Energy
      • 7.6 Forms and Conversion of Energy
      • 7.7 Energy Sources
      • 7.8 Wise use and Conservation of energy
      • 7.9 Resource Depletion and Environmental Degradation
      • Review Exercise

    Authors, Editors and Team

    • Authors (titles and names provided)
    • Editors and Evaluators (titles and names provided)
    • Team Leader (title and name provided)
    • 2021 by Addis Ababa Education Bureau
    • While every attempt has been made to trace and acknowledge copyright, the authors and publishers apologies for any accidental infringing.

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    Grade 7 General Science Textbook PDF

    Description

    This quiz explores the properties and behaviors of different states of matter, including solids, liquids, and gases. Questions focus on particle arrangements, compressibility, and physical properties of matter. Test your understanding of these fundamental concepts in physical science.

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