Unit 1 7.6C 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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances and cannot be reversed.

Front

Is melting ice a physical or chemical change?

Back

Physical change.

Front

Is rusting of iron a physical or chemical change?

Back

Chemical change.

Front

What happens to the matter in a physical change?

Back

The matter remains the same; it only changes in form or appearance.

Front

What happens to the matter in a chemical change?

Back

The matter changes into one or more new substances with different properties.

Front

Can a physical change be reversed?

Back

Yes, most physical changes can be reversed.

Front

Can a chemical change be reversed?

Back

No, chemical changes usually cannot be reversed.

Front

What is an example of a physical change?

Back

Cutting a piece of paper.

Front

What is an example of a chemical change?

Back

Burning wood.