phase changes

Front

What happens when heat is added to a substance?

Back

Energy moves into the substance causing the molecules to speed up.

Front

What occurs to molecules when their kinetic energy increases?

Back

The molecules move faster.

Front

What are the three main states of matter?

Back

Solid, Liquid, Gas.

Front

What is the term for the change of one state of matter to another?

Back

Phase Change.

Front

What causes condensation on a cold glass?

Back

The cold liquid in the glass cools the air around it, making it condense into a liquid.

Front

What is melting?

Back

The process of a solid turning into a liquid when heat is added.

Front

What is freezing?

Back

The process of a liquid turning into a solid when heat is removed.

Front

What is evaporation?

Back

The process of a liquid turning into a gas when heat is added.

Front

What is condensation?

Back

The process of a gas turning into a liquid when it cools down.

Front

What is sublimation?

Back

The process of a solid turning directly into a gas without becoming a liquid first.