3. Classify the following into physical and chemical changes.
(a) The cooking of food
(b) The evaporation of a liquid
(c) The digestion of food
(d) Burning
(e) The condensation of water vapour
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Answer:
Explanation:
Processes
Types of Changes
Photosynthesis
Chemical change
Dissolving sugar in water
Physical change
Burning of coal
Chemical change
Melting of wax
Physical change
Beating aluminium to make aluminium foil
Physical change
Digestion of food
Chemical change
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Answer:
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