Chemical and Physical changes 5th grade

Front

What is a gas?

Back

A state of matter that has no definite volume and no definite mass.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances and cannot be reversed.

Front

What is an example of a chemical change?

Back

Making slime, as it involves a chemical reaction.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance but does not change its chemical composition.

Front

What is an example of a physical change?

Back

Cutting hair, as it does not change the chemical structure of the hair.

Front

What happens to iron when it rusts?

Back

It undergoes a chemical change due to the reaction with oxygen and moisture.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change does.

Front

Can a chemical change be reversed?

Back

No, a chemical change cannot be reversed easily, unlike a physical change.

Front

What is an example of a reversible physical change?

Back

Melting ice into water, which can be frozen back into ice.

Front

What is an example of an irreversible chemical change?

Back

Burning wood, which produces ash and gases that cannot be turned back into wood.