Your teacher demonstrates one more way in which molecules behave when they are heated. She carefully warms a sealed plastic water bottle using a hand warmer. As the bottle of water
gets warmer, the container changes. Select the best explanation of what happens as thermal
energy increases
a. Heat takes up space and causes the bottle to expand.
b. The molecules move faster and closer together, which causes the bottle to collapse.
c. The molecules move slower and closer together, which causes the bottle to collapse.
d. The molecules move faster and farther apart, which causes the bottle to expand.