Phase Change

Front

What happens to molecules when thermal energy is added to a substance?

Back

The molecules move more quickly and farther away from each other.

Front

Do molecules move in a solid?

Back

Yes, molecules in a solid are always in motion, but they vibrate in place.

Front

What is the process called when a gas becomes a liquid?

Back

Condensation.

Front

What is it called when a solid changes directly into a gas?

Back

Sublimation.

Front

What happens to the kinetic energy of a substance when thermal energy is increased?

Back

The kinetic energy will increase.

Front

What is the term for the change of state from liquid to gas?

Back

Evaporation.

Front

What is deposition in terms of phase change?

Back

Deposition is the process where a gas changes directly into a solid.

Front

What is melting?

Back

Melting is the process where a solid changes into a liquid.

Front

What is the relationship between thermal energy and molecular movement?

Back

As thermal energy increases, molecular movement increases.

Front

What happens to the distance between molecules in a gas compared to a solid?

Back

Molecules in a gas are farther apart than in a solid.