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 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 composition of the original substance. Examples include rusting, burning, and cooking.

Front

Is dissolving salt in water a physical or chemical change?

Back

Physical change.

Front

What happens when baking soda and vinegar are mixed?

Back

It results in a chemical change.

Front

What is an example of a chemical change?

Back

Fireworks exploding.

Front

What describes a change in shape, form, or appearance but not in chemical composition?

Back

Physical change.

Front

What is rusting of a nail an example of?

Back

Chemical change.

Front

Can physical changes be reversed?

Back

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

Front

Can chemical changes be reversed?

Back

Chemical changes are usually not reversible by simple physical means.

Front

What is an example of a physical change?

Back

Ice melting into water.