Physical and Chemical Changes

A physical change is when the same matter is present but in a different shape or form.

A chemical change is when new matter is formed, and the original substance changes into something different.

Soured milk is a chemical change.

When sugar dissolves in water, a physical change occurs.

A change in temperature is a clue that a chemical change has occurred.

Cutting paper into pieces is a physical change.

An example of a physical change is melting ice.

An example of a chemical change is rust forming on iron.

When matter changes state, it can change from solid to liquid, liquid to gas, etc., but it remains the same substance.

Baking a cake is an example of a chemical change because new substances are formed.