Changes in Energy at the Molecular Level

Front

What is the state of matter where particles are not packed tightly and can move a little?

Back

Liquid

Front

What is temperature a measure of?

Back

How fast the molecules are moving in a substance.

Front

What happens to particles as temperature increases?

Back

They speed up.

Front

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

Back

Gas

Front

What happens to liquid water when enough heat is added?

Back

It changes into gas.

Front

What is the state of matter where particles are tightly packed and have no movement?

Back

Solid

Front

What is the best definition of a gas?

Back

A state of matter where molecules are far apart and move freely.

Front

What is the relationship between temperature and molecular movement?

Back

Higher temperature means faster molecular movement.

Front

What happens to the energy of particles when they are heated?

Back

Their energy increases.

Front

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

Back

Evaporation.