Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and the rearrangement of atoms. Examples include rusting, burning, and ripening.

Front

Give an example of a physical change.

Back

Melting butter is an example of a physical change.

Front

Give an example of a chemical change.

Back

Green bananas turning yellow as they ripen is an example of a chemical change.

Front

What happens during evaporation?

Back

Evaporation is the process where liquid water turns into water vapor, usually due to heat.

Front

What happens during condensation?

Back

Condensation is the process where water vapor cools and changes back into liquid water.

Front

Is crumpling paper a physical or chemical change?

Back

Crumpling paper is a physical change.

Front

Is souring milk a physical or chemical change?

Back

Souring milk is a chemical change.

Front

What is the difference between a physical change and a chemical change?

Back

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

Front

What is an example of a reversible physical change?

Back

Melting ice is an example of a reversible physical change.