They move faster and move farther apart as they absorb heat. They move faster and remain close together as they absorb heat. They move more slowly but move farther apart as they lose heat. They move faster and move farther apart as they lose heat.
I gave my students this multiple choice question: What happens to water molecules during the boiling process?

Only one answer is correct among these 4 choices:
- They move faster and move farther apart as they absorb heat.
- They move faster and remain close together as they absorb heat.
- They move more slowly but move farther apart as they lose heat.
- They move faster and move farther apart as they lose heat.

Could you tell me which one is correct?

They move faster and move farther apart as they absorb heat.