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, involving a rearrangement of atoms.

Front

Is change in color always a sign of a chemical change?

Back

No, change in color can indicate a chemical change, but it can also occur in physical changes.

Front

What is an example of a physical change?

Back

Freezing juice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Digesting food is an example of a chemical change.

Front

Is cutting a log into small pieces a physical or chemical change?

Back

Cutting a log into small pieces is a physical change.

Front

What happens to the chemical composition during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in new substances.

Front

Can physical changes be reversed?

Back

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

Front

Can chemical changes be reversed?

Back

Chemical changes are often not reversible by simple physical means.