Grade 5 Changes in Matter

The total energy of all the particles in an object.

A change that results in the formation of new chemical substances, such as when an egg spoils.

The mass of the ash is less than the original paper because some products of the reaction are given off as gas.

Oxygen.

Mass is neither created nor destroyed in a chemical or physical change.

A change that affects one or more physical properties of a substance without altering its chemical composition.

Rusting of iron.

Melting of ice.

A physical change does not change the substance's chemical identity, while a chemical change does.

It ensures that the total mass of reactants equals the total mass of products.