Physical an d Chemical Changes in Matter

Three examples of physical changes are

• boiling water, bursting a balloon, and burning a piece of paper

• burning gasoline, rotting of an egg, and exploding fire works

• freezing water, evaporation of gasoline, and melting ice cream

• sawing wood, crushing a can, and toasting a marshmallow

When acid rain falls on limestone , _______ weathering occurs.

• physical

• chemical

Using oxygen to separate molten copper sulfide into copper and sulfur dioxide is a ____.

• chemical change

• physical change