EVERYDAY SCIENCE

Detailed explanation-1: -Generally, physical changes do not involve the production of energy. Chemical changes usually involve the production of energy (which can be in the form of heat, light, sound, etc.) In a physical change, no new substance is formed.

Detailed explanation-2: -A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

Detailed explanation-3: -In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut.

Detailed explanation-4: -During a chemical change, the composition of the matter always changes. During a physical change, the composition of the matter never changes.

Detailed explanation-5: -A physical change is any change in a substance’s form that does not change its chemical makeup. Examples of physical changes are breaking a stick or melting ice. A chemical change, or chemical reaction, occurs when atoms of a substance are rearranged, and the bonds between the atoms are broken or formed.