Changes in Energy on the Molecular Level

Front

What does it mean to collide?

Back

To strike or hit something with great force.

Front

What happens when a substance changes from a gas to a liquid?

Back

Heat has been removed.

Front

What state does water change into when enough heat is added?

Back

Gas.

Front

What is a form of matter with indefinite shape and volume?

Back

Gas.

Front

What is a state of matter with a definite volume but no definite shape?

Back

Liquid.

Front

What is thermal energy?

Back

The energy that comes from the temperature of matter; it is the total energy of all the particles in an object.

Front

What happens to molecules when heat is added?

Back

They gain energy and move faster.

Front

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

Back

Evaporation.

Front

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

Back

Condensation.

Front

What is a solid?

Back

A state of matter with a definite shape and volume.