Physical and Chemical Changes

Front

What is a chemical change?

Back

A change where one or more new substances are created.

Front

What is a physical change?

Back

A change that does not create new substances; the substance may change form but remains the same substance.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Physical change.

Front

What is an example of a chemical change?

Back

Digesting your food.

Front

What are some signs of a chemical change?

Back

Fizzing, foaming, and burning.

Front

Is the melting of wax a chemical or physical change?

Back

Physical change.

Front

What happens to the molecules during a physical change?

Back

The molecules may change their arrangement but not their chemical composition.

Front

What happens to the molecules during a chemical change?

Back

The molecules rearrange to form new substances with different properties.

Front

Can a physical change be reversed?

Back

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

Front

Can a chemical change be reversed?

Back

Most chemical changes cannot be easily reversed.