Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include freezing, melting, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and exploding.

Front

Is freezing juice a physical or chemical change?

Back

Freezing juice is a physical change.

Front

Is cooking pancakes a physical or chemical change?

Back

Cooking pancakes is a physical change.

Front

What happens during a chemical change?

Back

During a chemical change, the substances involved undergo a transformation that results in new substances being formed.

Front

What is an example of a chemical change?

Back

Exploding fireworks is an example of a chemical change.

Front

What is an example of a physical change?

Back

Hammering wood to build a treehouse is an example of a physical change.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not change the chemical composition of a substance, while chemical changes do.

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as melting and freezing.

Front

Can a chemical change be reversed?

Back

Chemical changes are often not reversible, as new substances are formed.