State Of Matter Homework

15 Questions | Total Attempts: 117

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State Of Matter Homework

Homework for grade 7


Questions and Answers
  • 1. 
    When you cook pasta, you add salt to the water because:
    • A. 

      Because it lowers the boiling point of the water so I can add the pasta sooner.

    • B. 

      Because it raises the boiling point of the water, so that it will be hotter when it boils and the pasta will cook faster.

    • C. 

      Only because it tastes good. There is no effect on the way it cooks.

  • 2. 
    The relative randomness of molecules in the states of matter is best indicated by:
    • A. 

      Solids > liquids > gas

    • B. 

      liquid > gas > solid

    • C. 

      liquid > solid > gas

    • D. 

      gas > liquid > solid

  • 3. 
    Which statement is true concerning solids
    • A. 

      Metallic solids tend to have low melting and boiling points.

    • B. 

      The attractive forces are low between the atoms, ions, or molecules of a solid.

    • C. 

      A crystalline solid has an ordered structure, while an amorphous solid has no ordered arrangement.

  • 4. 
    The state of matter that has no definite size or shape is
    • A. 

      Solid

    • B. 

      liquid

    • C. 

      gas

  • 5. 
    The changing of a solid to a liquid is called
    • A. 

      melting

    • B. 

      freezing

    • C. 

      condensing

  • 6. 
    What happens during evaporation?
    • A. 

      A gas changes to a liquid

    • B. 

      A solid changes to a liquid

    • C. 

      A liquid changes to a gas

  • 7. 
    Butter going soft and runny on a hot day is an example of
    • A. 

      Freezing

    • B. 

      Melting

    • C. 

      Condensing

  • 8. 
    What is the missing word? When water is...., it starts to change from a liquid to a solid.
    • A. 

      Cooled

    • B. 

      Heated

    • C. 

      Boiled

  • 9. 
    Clouds are formed by
    • A. 

      Rain falling

    • B. 

      Hot air rising

    • C. 

      Water vapour condensing

  • 10. 
    We use the same water today that dinosaurs used when they lived on the Earth. Is this true or false?
    • A. 

      True

    • B. 

      False

    • C. 

      Neither

  • 11. 
    A gas condenses into a liquid when it is...
    • A. 

      Cooled

    • B. 

      Warmed

    • C. 

      Boiled

  • 12. 
    Which process is the opposite of condensation?
    • A. 

      Melting

    • B. 

      Freezing

    • C. 

      Evaporation

  • 13. 
    Which of these statements is FALSE?
    • A. 

      Evaporation is a change that can be reversed

    • B. 

      Evaporation only happens at 100°C

    • C. 

      Evaporation is helped by heat and by wind

  • 14. 
    The movement of water around and around our world is called...
    • A. 

      Condensation

    • B. 

      The water cycle

    • C. 

      Evaporation

  • 15. 
    Which of these is NOT a part of the water cycle?
    • A. 

      The Sun evaporates water on the Earth's surface into water vapour

    • B. 

      The water vapour rises, and cools and condenses into clouds

    • C. 

      When it rains, the clouds melt