Unit 2: Matter Exam Review

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What are the three states of matter?

Back

Solid, liquid, and gas.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What happens during freezing?

Back

A liquid turns into a solid as it loses energy.

Front

What happens during melting?

Back

A solid turns into a liquid as it gains energy.

Front

What is condensation?

Back

The process by which a gas turns into a liquid, losing energy in the process.

Front

What is vaporization?

Back

The process by which a liquid turns into a gas, gaining energy in the process.

Front

How many hydrogen atoms are in H2O?

Back

There are 2 hydrogen atoms in H2O.