Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change that does not result in a new substance. The matter remains the same before and after the change.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of one or more new substances.

Front

Give an example of a physical change.

Back

Examples include melting ice, dissolving sugar in water, or breaking a glass.

Front

Give an example of a chemical change.

Back

Examples include burning wood, rusting iron, or baking a cake.

Front

What happens to the weight of an object when it is burned?

Back

The weight of the object decreases because some of its mass is converted to gases.

Front

Does squeezing oranges to make juice result in a physical or chemical change?

Back

It results in a physical change because the oranges are still oranges, just in liquid form.

Front

What is rusting an example of?

Back

Rusting is an example of a chemical change.

Front

What is the main difference between physical and chemical changes?

Back

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

Front

Can a physical change be reversed?

Back

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

Front

Can a chemical change be reversed?

Back

Most chemical changes cannot be easily reversed.