Heat and Temperature Concepts

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Questions and Answers

What happens when energy is transferred to a substance?

  • The atoms/molecules spread further apart, but the temperature stays the same.
  • The atoms/molecules move slower, decreasing the temperature.
  • The atoms/molecules move faster, increasing the temperature. (correct)
  • The atoms/molecules stay the same speed, but the volume increases.

What happens when a substance is cooled?

  • The atoms/molecules gain energy and move faster.
  • The atoms/molecules get closer together, but the temperature stays the same.
  • The atoms/molecules lose energy and move slower. (correct)
  • The atoms/molecules stay the same speed, but the volume decreases.

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

  • The faster the atoms/molecules move, the lower the temperature.
  • The speed of the atoms/molecules does not affect the temperature.
  • Temperature is not related to the speed of the atoms/molecules.
  • The faster the atoms/molecules move, the higher the temperature. (correct)

How do gaseous atoms/molecules behave?

<p>Gaseous atoms/molecules travel in straight lines until they collide with each other or an object, causing their direction to change. (B)</p> Signup and view all the answers

How does the volume of a substance change when it is heated?

<p>The volume increases as the atoms/molecules spread further apart. (A)</p> Signup and view all the answers

How can we detect the presence of a gas?

<p>Gaseous particles travel in all directions, and if the gas is an odor, it can reach our noses, allowing us to detect it. (D)</p> Signup and view all the answers

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