Solids, Liquids, Gas

Front

What is a gas?

Back

A substance or matter in a state in which it will expand freely to fill the whole of a container.

Front

What is a liquid?

Back

A substance that flows freely but is of constant volume.

Front

What is a solid?

Back

A substance that has a definite shape and volume, with closely packed molecules.

Front

What happens during melting?

Back

A solid changes to a liquid when it absorbs heat.

Front

What happens during freezing?

Back

A liquid changes to a solid when it loses heat.

Front

What is evaporation?

Back

The process by which a liquid turns into a gas at temperatures below its boiling point.

Front

What is condensation?

Back

The process by which a gas turns into a liquid when it cools.

Front

What happens to molecules when the temperature increases?

Back

The molecules move faster and spread apart.

Front

What is the difference between boiling and evaporation?

Back

Boiling occurs at a specific temperature throughout the liquid, while evaporation occurs at the surface at any temperature.

Front

What is a phase change?

Back

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