Phase Change: Chapter 1

Front

What is a phase change?

Back

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

Front

What happens to the molecules during melting?

Back

During melting, the molecules gain energy and move more freely, transitioning from a solid to a liquid.

Front

What is freezing?

Back

Freezing is the process where a liquid turns into a solid as the temperature decreases and the molecules lose energy.

Front

What is condensation?

Back

Condensation is the process where a gas turns into a liquid as it cools down and loses energy.

Front

What is evaporation?

Back

Evaporation is the process where a liquid turns into a gas, usually when it is heated and the molecules gain energy.

Front

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

Back

Solid.

Front

What is the state of matter where molecules are close together but can move around each other?

Back

Liquid.

Front

What is the state of matter where molecules are far apart and move freely?

Back

Gas.

Front

What phase change occurs when a gas becomes a liquid?

Back

Condensation.

Front

What phase change occurs when a liquid becomes a gas?

Back

Evaporation.