Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in an item's properties like its shape, size, or density.

Front

What is a chemical change?

Back

A chemical change is a process that results in the formation of one or more new substances.

Front

How does a physical change differ from a chemical change?

Back

A physical change does not create a new substance, while a chemical change does.

Front

Can a physical change produce a new substance?

Back

No, a physical change does not produce a new substance.

Front

What happens to the chemical composition of a substance during a physical change?

Back

The chemical composition remains the same during a physical change.

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 rust forming on iron.

Front

What is the role of energy in physical changes?

Back

Energy can be absorbed or released during physical changes, but the substance itself remains unchanged.

Front

What is the role of energy in chemical changes?

Back

Energy is often absorbed or released during chemical changes, which can affect the rate of the reaction.

Front

Is dissolving salt in water a physical or chemical change?

Back

Dissolving salt in water is a physical change.