Chemical and Physical 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 melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the chemical composition of the substance. Examples include burning, rusting, and cooking.

Front

When sugar dissolves in water, what type of change occurs?

Back

Physical change.

Front

What happens to the chemical composition of a substance during a physical change?

Back

The chemical composition remains the same.

Front

What happens to the chemical composition of a substance during a chemical change?

Back

The chemical composition changes, resulting in new substances.

Front

Is cracking an egg a physical or chemical change?

Back

Physical change.

Front

What is an example of a chemical change?

Back

Burning sugar.

Front

What is an example of a physical change?

Back

Freezing chocolate-covered bananas.

Front

What type of change occurs when fireworks explode?

Back

Chemical change.

Front

Can physical changes be reversed?

Back

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