Physical and Chemical Changes

Front

Melting ice

Back

Physical – The ice changes to water, but it’s still H₂O. No new substance is formed.

Front

Burning wood

Back

Chemical – The wood turns into ash, smoke, and gases, forming new substances.

Front

Tearing paper

Back

Physical – The shape changes, but the paper is still paper.

Front

Baking a cake

Back

Chemical – Ingredients react and form a new product with different properties.

Front

Dissolving sugar in water

Back

Physical – Sugar spreads out in water, but no new substance is made.

Front

Rusting iron

Back

Chemical – Iron reacts with oxygen to form rust (iron oxide), a new substance.

Front

Freezing water

Back

Physical – Water changes to ice, but it’s still the same substance.

Front

Frying an egg

Back

Chemical – The proteins change when heated and can't go back. A new substance is formed.

Front

Cutting an apple

Back

Physical – Only the size and shape change; it’s still an apple.

Front

Apple turning brown

Back

Chemical – The apple reacts with air, forming new brown compounds.