Physical & Chemical Changes

Front

What is a chemical change?

Back

A chemical change creates a new substance and cannot be undone.

Front

What is a physical change?

Back

A physical change alters the physical properties of a substance without changing its chemical composition.

Front

Is burning wood a physical or chemical change?

Back

Chemical change.

Front

Is melting ice a physical or chemical change?

Back

Physical change.

Front

True or false: Some physical changes involve chemical reactions.

Back

False.

Front

What happens during a chemical change?

Back

A chemical change involves the breaking and forming of bonds between atoms, resulting in new substances.

Front

What is an example of a chemical change?

Back

Rusting of iron.

Front

What is an example of a physical change?

Back

Dissolving sugar in water.

Front

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

Back

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

Front

What is a sign that a chemical change has occurred?

Back

Production of gas, change in color, formation of a precipitate, or change in temperature.