Physical and Chemical Changes

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 ice or breaking glass.

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 wood or rusting metal.

Front

Does rusting of iron represent a physical or chemical change?

Back

Chemical change.

Front

What happens during a physical change?

Back

During a physical change, the form of a substance changes, but its chemical identity remains the same.

Front

What happens during a chemical change?

Back

During a chemical change, the substances involved undergo a transformation that changes their chemical structure, resulting in new substances.

Front

Is chopping vegetables a physical or chemical change?

Back

Physical change.

Front

Is baking a cake a physical or chemical change?

Back

Chemical change.

Front

What is an example of a physical change?

Back

Examples include freezing water, dissolving sugar in water, or chopping wood.

Front

What is an example of a chemical change?

Back

Examples include burning paper, cooking an egg, or rusting iron.

Front

What is the difference between physical and chemical changes?

Back

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