EVERYDAY SCIENCE

Detailed explanation-1: -A change in which one or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.

Detailed explanation-2: -Chemical changes are those where one or more substances are combined to produce a new substance. At the end of a chemical change, you have a new substance. Burning a piece of paper would be a chemical change, as would baking a cake. Ozone is an invisible gas made of 3 oxygen atoms.

Detailed explanation-3: -A chemical change is also called a chemical reaction. Examples are burning of any substance, and rusting of iron.

Detailed explanation-4: -A change in which a substance undergoes a change in its chemical properties is called a chemical change. New substances are formed. For rusting, the presence of both oxygen and water (or water vapour) is essential.

Detailed explanation-5: -In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.