Physical and Chemical Changes

Front

What is a chemical change?

Back

A change in which new substances are formed, and it cannot be undone.

Front

What is a physical change?

Back

A change that alters the physical properties of an object but does not create a new substance.

Front

Does a chemical change create new substances?

Back

Yes, a chemical change creates new substances.

Front

Can a physical change be reversed?

Back

Yes, physical changes can often be reversed.

Front

What happens to the substances in a chemical change?

Back

The original substances are transformed into one or more new substances.

Front

Give an example of a physical change.

Back

Melting butter for popcorn.

Front

Give an example of a chemical change.

Back

Burning wood.

Front

What is the main difference between physical and chemical changes?

Back

Physical changes do not create new substances, while chemical changes do.

Front

Is melting a chocolate bar a physical or chemical change?

Back

It is a physical change.

Front

What is an indicator of a chemical change?

Back

Formation of gas, change in color, or production of heat.