Science Year 6A: Materials and Scientific Enquiry
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Science Year 6A: Materials and Scientific Enquiry

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Questions and Answers

What characteristic of liquids distinguishes them from solids and gases?

  • They expand to fill any space.
  • They can flow. (correct)
  • They are easily compressed.
  • They have a fixed shape.

    • Which state of matter is almost impossible to compress?

  • Plasma
  • Liquid
  • Solid (correct)
  • Gas

    • What is the process of turning a liquid into a gas called?

  • Evaporation (correct)
  • Melting
  • Freezing
  • Condensation

    • At what temperature does water boil according to the text?

    <p>100°C</p> Signup and view all the answers

    Which type of change involves changes between states and is reversible according to the text?

    <p>Physical change</p> Signup and view all the answers

    What happens when a gas turns into a liquid?

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

    What happens to the particles in a substance when they get closer together due to a temperature change?

    <p>No changes in substance</p> Signup and view all the answers

    In dissolving sugar in water, what is the role of water?

    <p>Water is the solvent</p> Signup and view all the answers

    Which type of changes are generally reversible, although some situations can make them irreversible?

    <p>Physical changes</p> Signup and view all the answers

    What indicates the creation of a new substance according to the text?

    <p>Formation of bubbles</p> Signup and view all the answers

    Why are chemical changes always considered irreversible?

    <p>They create new substances</p> Signup and view all the answers

    What determines the speed at which sugar dissolves in water?

    <p>Temperature of the solution</p> Signup and view all the answers

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