Physical vs. 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. It involves a chemical reaction and changes the composition of the original substance. Examples include rusting, burning, and cooking.

Front

Is boiling water a physical or chemical change?

Back

Physical change.

Front

Is burning wood a physical or chemical change?

Back

Chemical change.

Front

What happens to the molecules during a physical change?

Back

The molecules may change their state (solid, liquid, gas) or appearance, but their chemical structure remains the same.

Front

What happens to the molecules during a chemical change?

Back

The molecules rearrange to form new substances with different chemical properties.

Front

Is freezing juice a physical or chemical change?

Back

Physical change.

Front

Is digesting food a physical or chemical change?

Back

Chemical change.

Front

What is an example of a physical change in the kitchen?

Back

Chopping vegetables is a physical change because it alters the size and shape but not the chemical composition.

Front

What is an example of a chemical change in nature?

Back

Photosynthesis in plants is a chemical change where carbon dioxide and water are converted into glucose and oxygen.