Question

What happens to water molecules as water is heated?(1 point)
Responses

The molecules move more slowly.
The molecules move more slowly.

The molecules get closer together.
The molecules get closer together.

The molecules become less dense.
The molecules become less dense.

The molecules sink.

Answer 1

As water is heated, the correct response is:

**The molecules become less dense.**

When water is heated, its molecules gain energy and move faster, causing the water to expand and thus decrease in density.