Question 16
Classify the following processes into physical or chemical changes:
(i) Beating of aluminium metal to make aluminium foil. (ii) Digestion of food. (iii) Cutting of a log of wood into pieces. (iv) Burning of crackers.
Classify the following as physical or chemical changes:
(i) Cooking of food (ii) Boiling of water
(iii) Cutting of trees (iv) Dissolving salt in water
(v) Digestion of food (vi) Melting of ice
(i) Beating of aluminium metal to make aluminium foil. (ii) Digestion of food. (iii) Cutting of a log of wood into pieces. (iv) Rusting of iron.
Classify the following processes into physical or chemical changes and explain the reason in one sentence. (4 marks)