EVERYDAY SCIENCE

Detailed explanation-1: -Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change-none is created or destroyed. This concept is called the Law of Conservation of Mass .

Detailed explanation-2: -When a substance changes state, the mass of the substance does not change. When a substance dissolves in a liquid, the total mass of the substance and the liquid it dissolves in does not change. When substances react to form new substances as products, the mass of the products is the same as the mass of the reactants.

Detailed explanation-3: -Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

Detailed explanation-4: -No new atoms are created during the reaction and no existing atoms disappear or are destroyed, so mass is conserved.

Detailed explanation-5: -In physical changes, the arrangement of particles may change but the mass, number of atoms, and number of molecules will stay the same.