Question

When heat energy is added, two changes are observed:

Change A: Solid changes phases to a liquid.
Change B: Liquid changes phases to a gas.

What are the names for phase changes A and B?

A is freezing and B is evaporation.
A is freezing and B is condensation.
A is melting and B is evaporation.
A is melting and B is condensation.

Answer 1

The correct names for the phase changes are:

**A is melting and B is evaporation.**

- Change A (solid to liquid) is called melting.
- Change B (liquid to gas) is called evaporation.