Phase Change REVIEW

Front

What happens to heat energy when ice cubes melt?

Back

Heat energy increases.

Front

What state of matter forms when thermal energy is removed from a liquid?

Back

Solid.

Front

What occurs to most substances when they gain heat?

Back

They expand because their molecules are more excited and move further apart.

Front

What happens to water molecules in clothes when they dry on a sunny day?

Back

The water molecules move faster and become water vapor.

Front

What property indicates whether a substance is a liquid or a gas at room temperature?

Back

Boiling Point.

Front

What is the process called when a solid turns into a liquid?

Back

Melting.

Front

What is the process called when a liquid turns into a solid?

Back

Freezing.

Front

What is the process called when a liquid turns into a gas?

Back

Evaporation.

Front

What is the process called when a gas turns into a liquid?

Back

Condensation.

Front

What happens to the molecules of a substance as it heats up?

Back

The molecules move faster and spread apart.