Physical and Chemical Changes in Matter

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of matter changes, but its chemical composition remains the same. Examples include melting, freezing, and breaking.

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

What happens to water when it freezes?

Back

When water freezes, it undergoes a physical change from liquid to solid, forming ice.

Front

What is the state of matter that has a definite shape and volume?

Back

Solid.

Front

What is an example of a physical change?

Back

Glass breaking into tiny shards.

Front

What is an example of a chemical change?

Back

Opening and shaking a hand warmer packet makes it heat up.

Front

Which of the following is NOT a chemical change: sour milk, burning wood, breaking a pencil, rust?

Back

Breaking a pencil is NOT a chemical change; it is a physical change.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not alter the chemical composition of a substance, while chemical changes do.

Front

What is an example of a substance undergoing a chemical change?

Back

Burning wood, which produces ash and smoke.

Front

What occurs during a physical change?

Back

The substance may change its state (solid, liquid, gas) or shape, but its chemical identity remains unchanged.