Changes in Energy on the Molecular Level

Front

What happens to liquid water when enough heat is added?

Back

It changes into gas.

Front

What does it mean to move rhythmically and steadily?

Back

To vibrate.

Front

In which state are molecules spaced far apart and only collide occasionally?

Back

Gas.

Front

What is the smallest particle of an element made of electrons, protons, and neutrons?

Back

Atom.

Front

What does it mean to strike or hit something with great force?

Back

To collide.

Front

What is thermal energy?

Back

The energy that comes from the temperature of matter.

Front

What state of matter has a definite shape and volume?

Back

Solid.

Front

What state of matter has a definite volume but no definite shape?

Back

Liquid.

Front

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

Back

Melting.

Front

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

Back

Evaporation.