Adding or removing heat causes solids, liquids and gases to change from one state to another.
Matter comes as solids, liquids, and gases, each with their own properties.
Matter is never destroyed when it is changed.
What matter changes it continues to exist, just in a different form.
Chemical changes create a new substance while physical changes do not change the identity of a substance.
Physical changes do not change the identity of the substance and are often reversible.
Chemical changes are irreversible and a new substance is always made.
People can be creative with chemistry by applying their scientific knowledge.
Gas is produced during some chemical changes.
People use their knowledge of chemistry to create new products.
