Changes in Matter
Classify the following as examples of Chemical or Physical changes.
Sugar dissolves in water. *
Hydrochloric acid reacts with potassium hydroxide to produce a salt, water and heat. *
A pellet of sodium is sliced in two. *
Evaporation. *
Ice melting. *
Milk sours. *
Grass growing in a lawn. *
A tire is inflated with air. *
Food is digested in the stomach. *
Iron rusts. *
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