Give the main differences between physical changes and chemical changes.

Physical Change Chemical Change

(1). New substances are not formed 1. New substances are formed

(2). A physical change is a temporary change 2. A chemical change is a permanent change

(3). A physical change is easily reversible 3. A chemical change is usually irrerversible.

(4). The mass of substances does not alter in a 4. The mass of substance does alter in a physical change. chemical change