Changes in Energy on the Molecular Level

Front

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

Back

Melting

Front

What is the definition of a liquid?

Back

A state of matter with definite volume and indefinite shape.

Front

What is a state of matter that has no definite shape or volume?

Back

Gas

Front

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

Back

Vaporization.

Front

What is evaporation?

Back

The process that occurs when vaporization takes place only on the surface of a liquid.

Front

What is condensation?

Back

The process by which a gas turns into a liquid.

Front

What is boiling?

Back

The process of vaporization that occurs throughout the liquid, not just at the surface.

Front

What is the definition of a gas?

Back

A state of matter with no definite shape and no definite volume.

Front

What happens to the energy of molecules during melting?

Back

Molecules gain energy and move apart.

Front

What happens to the energy of molecules during freezing?

Back

Molecules lose energy and come closer together.