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 boiling water, melting ice, and shredding paper.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting iron, baking a cake, and burning wood.

Front

Give an example of a physical change.

Back

Boiling water.

Front

Give an example of a chemical change.

Back

Rusting iron.

Front

What happens during digestion that is a chemical change?

Back

Stomach acids dissolve food into nutrients.

Front

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

Back

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

Front

What is an example of a task in the kitchen that describes only a physical change?

Back

Melting butter.

Front

What type of change occurs when aluminum cans are crushed?

Back

A physical change because the material remains the same.

Front

What is an example of both a physical change and a chemical change?

Back

Freezing water (physical change) and burning coal (chemical change).

Front

What is the role of teeth in digestion?

Back

Teeth break food into smaller pieces, which is a physical change.