States of Matter and Phase Changes

Front

What are the three main states of matter?

Back

Solid, Liquid, Gas

Front

How do molecules behave in a solid state?

Back

Molecules are closely packed together and vibrate in place.

Front

How do molecules behave in a liquid state?

Back

Molecules are close together but can slide past one another.

Front

How do molecules behave in a gas state?

Back

Molecules are far apart and move freely.

Front

What is the process of a solid turning into a liquid called?

Back

Melting

Front

What is the process of a liquid turning into a gas called?

Back

Evaporation

Front

What is the process of a gas turning into a liquid called?

Back

Condensation

Front

What is the process of a liquid turning into a solid called?

Back

Freezing

Front

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

Back

The thermal energy increases, allowing molecules to move more freely.

Front

What happens to the thermal energy of a substance when it freezes?

Back

The thermal energy decreases, causing molecules to become more tightly packed.