Podcast
Questions and Answers
What happens when a substance is heated?
What happens when a substance is heated?
- The atoms/molecules lose energy and move slower
- The atoms/molecules gain energy and move faster (correct)
- The atoms/molecules contract in size
- The atoms/molecules expand in size
How is temperature related to the motion of atoms/molecules?
How is temperature related to the motion of atoms/molecules?
- Temperature is a measure of the average speed of atoms/molecules (correct)
- Temperature is a measure of the potential energy of atoms/molecules
- Temperature is a measure of the total energy of atoms/molecules
- Temperature is a measure of the mass of atoms/molecules
What happens to the volume of a substance when it is cooled?
What happens to the volume of a substance when it is cooled?
- The volume changes unpredictably
- The volume decreases as the atoms/molecules get closer together (correct)
- The volume increases as the atoms/molecules spread further apart
- The volume remains the same
Which of the following statements is true about the atoms/molecules themselves during heating or cooling?
Which of the following statements is true about the atoms/molecules themselves during heating or cooling?
What happens to the collisions between atoms/molecules when a substance is heated?
What happens to the collisions between atoms/molecules when a substance is heated?
What is the main difference between evaporation and boiling?
What is the main difference between evaporation and boiling?
Why does the drop of rubbing alcohol evaporate faster on your hand than on the table?
Why does the drop of rubbing alcohol evaporate faster on your hand than on the table?
What role do air particles play in the process of evaporation?
What role do air particles play in the process of evaporation?
What effect does an increase in temperature have on the rate of evaporation?
What effect does an increase in temperature have on the rate of evaporation?
At what point does a liquid reach its boiling point?
At what point does a liquid reach its boiling point?
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