Physical vs 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 alter the chemical composition of a substance.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Physical change.

Front

What happens to the substances in a chemical change?

Back

They undergo a transformation to form new substances.

Front

What happens to the substances in a physical change?

Back

They retain their original properties and composition.

Front

Give an example of a physical change.

Back

Breaking a cracker into pieces.

Front

Give an example of a chemical change.

Back

Rusting of iron.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings.

Front

What is an exothermic reaction?

Back

A reaction that releases heat to its surroundings.

Front

Is cutting hair a chemical or physical change?

Back

Physical change.