Physical and Chemical Changes

A process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, fizzing, or the production of gas.

A change that affects one or more physical properties of a substance without altering its chemical composition, such as changes in state, shape, or size.

Burning wood, rusting iron, or souring milk.

Melting ice, boiling water, or breaking a glass.

A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

Physical change.

The molecules rearrange to form new substances with different properties.

Indicators include color change, temperature change, gas production, and the formation of a precipitate.

Physical change.

No, it is a chemical change.