Heating and Cooling of Substances: Energy Transfer and Temperature Change
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Questions and Answers

What happens when a substance is heated?

  • Energy is transferred to the substance, and the atoms/molecules move faster. (correct)
  • The volume of the substance decreases as the atoms/molecules get closer together.
  • Energy is transferred from the substance, and the atoms/molecules move slower.
  • The atoms/molecules themselves expand in size.

    • How does temperature relate to the speed of atoms/molecules?

  • Temperature is a measurement of the average speed of atoms/molecules. (correct)
  • Temperature is a measurement of the total speed of all atoms/molecules.
  • Temperature is not related to the speed of atoms/molecules.
  • Temperature is a measurement of the number of atoms/molecules in the substance.

    • What happens to the volume of a substance when it is cooled?

  • The volume decreases as the atoms/molecules get closer together. (correct)
  • The volume changes randomly and is not related to the cooling of the substance.
  • The volume stays the same as the atoms/molecules do not change in size.
  • The volume increases as the atoms/molecules spread further apart.

    • How do the collisions between atoms/molecules change when a substance is warmed?

    <p>The collisions become stronger and more frequent.</p> Signup and view all the answers

    What happens to the atoms/molecules themselves when a substance is heated or cooled?

    <p>The atoms/molecules do not change in size, but their speed changes.</p> Signup and view all the answers

    What happens to the speed of atoms/molecules when a substance is cooled?

    <p>The speed decreases</p> Signup and view all the answers

    How does the volume of a substance change when atoms/molecules lose energy?

    <p>The volume decreases</p> Signup and view all the answers

    What is the relationship between temperature and the speed of atoms/molecules?

    <p>Higher temperature means faster speed</p> Signup and view all the answers

    When a substance is warmed, what happens to the collisions between atoms/molecules?

    <p>Collisions become stronger and more frequent</p> Signup and view all the answers

    How do the collisions between atoms/molecules change when a substance is cooled?

    <p>Collisions become weaker and less frequent</p> Signup and view all the answers

    What happens to the volume of a substance when the atoms/molecules spread further apart?

    <p>Volume increases</p> Signup and view all the answers

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