(Amplify Phase Change)

Front

How do the molecules in a solid behave?

Back

Molecules in a solid move in place, vibrating slightly but not changing position.

Front

What happens to the sweet food when energy is added?

Back

The sweet food changes phase because the molecules move fast enough to overcome the attraction between them, allowing them to move away from each other.

Front

What occurs to particles when the temperature of matter increases?

Back

The particles speed up and move farther apart.

Front

What does it mean that matter cannot be created nor destroyed?

Back

It means that matter can only be transformed or changed from one form to another.

Front

What happens to water molecules when energy is removed from liquid water?

Back

The water molecules move slower and start moving in place, indicating a phase change to solid.

Front

Define phase change.

Back

A phase change is the transformation of a substance from one state of matter to another, such as solid to liquid or liquid to gas.

Front

What is the effect of temperature on the movement of molecules in a gas?

Back

In a gas, as temperature increases, molecules move faster and spread farther apart.

Front

What is the relationship between energy and phase changes?

Back

Energy must be added or removed for a substance to change its phase; adding energy can cause melting or vaporization, while removing energy can cause freezing or condensation.

Front

What is the state of matter where molecules are tightly packed and vibrate in place?

Back

Solid.

Front

What happens to the molecules in a liquid when it is heated?

Back

The molecules in a liquid gain energy, move faster, and may eventually overcome attractions to become a gas.