EVERYDAY SCIENCE

Detailed explanation-1: -When a material undergoes a change in shape, size or state it is called a physical change. Generally, no new substance is formed in a physical change. For example change of state of water from solid to liquid or liquid to gas is a physical change as only state of water is changing and no new substance is formed.

Detailed explanation-2: -Changes of state are physical changes in matter. They are reversible changes that do not involve changes in matter’s chemical makeup or chemical properties. Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization.

Detailed explanation-3: -Remember that a physical change is a change in properties such as texture, shape, or state, while a chemical change represents the formation of a new substance after atoms are rearranged in a chemical reaction.

Detailed explanation-4: -Phase changes are physical changes that take place when matter changes energy states, but chemical bonds are not broken or formed.

Detailed explanation-5: -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.