Physical or Chemical Change

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. Examples include burning, rusting, and cooking.

Front

Give an example of a physical change.

Back

An example of a physical change is ice melting into water.

Front

Give an example of a chemical change.

Back

An example of a chemical change is iron rusting when exposed to moisture.

Front

What happens to the molecules during a physical change?

Back

During a physical change, the molecules rearrange but do not change their chemical structure.

Front

What happens to the molecules during a chemical change?

Back

During a chemical change, the molecules break apart and form new molecules with different chemical structures.

Front

Is boiling water a physical or chemical change?

Back

Boiling water is a physical change because it changes from liquid to gas without altering its chemical composition.

Front

Is baking a cake a physical or chemical change?

Back

Baking a cake is a chemical change because it involves a chemical reaction that produces new substances.

Front

What is the law of conservation of mass in relation to chemical changes?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of the reactants equals the total mass of the products.

Front

What are indicators of a chemical change?

Back

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