Changes in Energy at the Molecular Level

Front

What is the state of matter characterized by having a definite shape and volume?

Back

Solid

Front

What is the state of matter that has a definite volume but takes the shape of its container?

Back

Liquid

Front

What is the state of matter that has no definite shape or volume?

Back

Gas

Front

As thermal energy increases, what happens to the movement of the molecules?

Back

The movement of the molecules increases.

Front

What happens to the molecules when heat is added to a substance?

Back

They vibrate faster.

Front

What is thermal energy?

Back

The total kinetic energy of the particles in a substance.

Front

What happens to the spacing between particles as thermal energy is added?

Back

The spacing between particles increases.

Front

What is an atom?

Back

The smallest particle of an element made of electrons, protons, and neutrons.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

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

Back

Melting.