Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change that does not alter the chemical composition of a substance. Examples include cutting, bending, or changing states of matter.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Indicators include color change, gas production, heat, or light.

Front

Is cutting wood a physical or chemical change?

Back

Cutting wood is a physical change.

Front

What are some indicators of a chemical change?

Back

Indicators of a chemical change include change in color, production of light, production of heat, and production of gas.

Front

Is chewing food a physical or chemical change?

Back

Chewing food is a physical change.

Front

What are physical changes?

Back

Physical changes are changes that do not form a new substance and are often reversible.

Front

What happens to water when it changes from solid to liquid?

Back

Water changing from solid to liquid is both a physical change and a change in the phase of matter.

Front

Can physical changes be reversed?

Back

Yes, physical changes are often reversible.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice.