• A. At warm temperatures, molecules exchange electrons more.
• B. At warm temperatures, molecules become larger.
• C. At warm temperatures, molecules move around faster.
• D. At cold temperatures, molecules become smaller.

• A. Temperature is related to the motion of the particles in a substance and heat is related to how much energy moves between substances at different temperatures.
• B. Temperature is measured with a thermometer and heat is measured with a barometer.
• C. There is no difference — heat and temperature are the same.
• D. Heat refers to how hot a substance is but temperature measures both how hot or cold a substance is.

Question A. How do molecules at warm temperatures differ from molecules at cool temperatures?

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Question B. What is the difference between heat and temperature?

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