Front

What is a chemical reaction?

Back

A process where substances (reactants) change into new substances (products) with different properties.

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

Give an example of a physical change.

Back

Freezing water into ice.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is evidence of a chemical reaction?

Back

Color change, odor change, and change in properties.

Front

What is a chemical change?

Back

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

Front

What is the role of a materials scientist?

Back

To study chemical reactions to create new materials.

Front

What happens during a physical change?

Back

No new substances are formed.

Front

What is an example of a chemical change?

Back

Burning wood.

Front

What are reactants?

Back

The starting substances in a chemical reaction.