Phase Changes

Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another due to changes in temperature or pressure.

Front

What are the three main phases of matter?

Back

The three main phases of matter are solid, liquid, and gas.

Front

In which phase do molecules have a definite shape?

Back

Solid.

Front

In which phase do molecules have a definite volume but no definite shape?

Back

Liquid.

Front

In which phase do molecules have neither a definite shape nor a definite volume?

Back

Gas.

Front

What is evaporation?

Back

Evaporation is the process by which a liquid turns into a gas.

Front

What is condensation?

Back

Condensation is the process by which a gas turns into a liquid.

Front

What happens to the volume of a gas when its pressure increases?

Back

The volume of the gas decreases.

Front

What happens to the pressure of a gas when its volume decreases?

Back

The pressure of the gas increases.

Front

What is melting?

Back

Melting is the process by which a solid turns into a liquid.