Changes in States of Matter

Front

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

Back

melting

Front

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

Back

condensation

Front

How does the addition of thermal energy affect the molecules in a substance?

Back

As the thermal energy is added, the molecules get excited and move farther apart.

Front

What is the phase change from a liquid to a gas called?

Back

vaporization

Front

What is the phase change that occurs when thermal energy is lost and a substance changes from a gas to a liquid?

Back

condensation

Front

What is sublimation?

Back

The process where a solid changes directly into a gas without becoming a liquid first.

Front

What is the reverse process of sublimation called?

Back

Deposition, where a gas changes directly into a solid.

Front

What happens to the temperature of a substance during a phase change?

Back

The temperature remains constant during a phase change, even though heat is added or removed.

Front

What is evaporation?

Back

The process where a liquid changes into a gas at temperatures below its boiling point.

Front

What is boiling?

Back

The rapid vaporization of a liquid that occurs when it reaches its boiling point.