Physical vs. 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 changes in state, such as melting or freezing.

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 burning, rusting, and digestion.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change.

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 example of a physical change?

Back

An example of a physical change is ice forming and then melting back into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is the reaction of vinegar and baking soda, which produces carbon dioxide gas.

Front

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

Back

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

Front

Is ripping paper a physical or chemical change?

Back

Ripping paper is a physical change.

Front

What is a sign that a chemical change has occurred?

Back

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