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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, often accompanied by energy changes such as heat or light.

Front

Give an example of a physical change.

Back

Melting ice cream is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

What happens to the substances in a physical change?

Back

In a physical change, the substances retain their original properties and composition.

Front

What happens to the substances in a chemical change?

Back

In a chemical change, the original substances are transformed into new substances with different properties.

Front

What is an indicator of a chemical change?

Back

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

Front

Is breaking glass a physical or chemical change?

Back

Breaking glass is a physical change.

Front

What is an example of a change that releases heat?

Back

Combustion, such as burning wood, is an example of a change that releases heat.

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.