Front

What happens to the kinetic energy of a substance when it melts?

Back

The kinetic energy increases.

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 solid?

Back

Particles that are tightly compacted.

Front

What are the three main phases of matter?

Back

Solid, liquid, and gas.

Front

What is a liquid?

Back

A substance that flows freely but is of constant volume.

Front

What is the definition of matter?

Back

Anything that has mass and takes up space.

Front

What is the difference between a solid and a liquid?

Back

Solids have tightly packed particles, while liquids have particles that are less tightly packed and can flow.

Front

What is the process of melting?

Back

The transition from solid to liquid when heat is applied.

Front

What is the process of freezing?

Back

The transition from liquid to solid when heat is removed.

Front

What is evaporation?

Back

The process by which a liquid turns into a gas.