4 Select all the correct answers.
When wax is heated, it turns into a liquid. How are the wax molecules affected by this change of state?
The molecules gain energy
The molecules lose energy.
The molecules move closer to one another
The space between the molecules increases,
The space between the molecules decreases,
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The molecules gain energy.

The space between the molecules increases.

Explanation:

A solid's molecules vibrate and are very close together.

A liquid's molecules slide and are further apart than those of a solid.

When a solid melts into a liquid, the molecules drift apart and are able to move around. The process also requires energy, so the molecules gain energy in order to change states. Therefore, the molecules gain energy and the space between them increases.