Phase Change

Front

What is phase change?

Back

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

Front

What are the four main phases of matter?

Back

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

Front

What happens to the kinetic energy of molecules during melting?

Back

During melting, the kinetic energy of molecules increases as they gain energy to overcome the forces holding them in a solid state.

Front

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

Back

The process is called evaporation.

Front

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

Back

The process is called condensation.

Front

What happens to the temperature of a substance during a phase change?

Back

The temperature of a substance remains constant during a phase change, even though heat is added or removed.

Front

What is the average kinetic energy of particles in a substance called?

Back

The average kinetic energy of particles in a substance is called temperature.

Front

What occurs during freezing?

Back

During freezing, a liquid loses kinetic energy and changes into a solid.

Front

What is sublimation?

Back

Sublimation is the phase change in which a solid turns directly into a gas without passing through the liquid phase.

Front

What is deposition?

Back

Deposition is the phase change in which a gas turns directly into a solid without becoming a liquid first.