Question

Classify the following as physical or chemical changes :

1. Cooking of food
2. Boiling of water
3. Cutting of trees
4. D0issolving salt in water
5. Digestion of food
6. Melting of ice

Answer 1

1. Cooking of food – Chemical change
2. Boiling of water – Physical change
3. Cutting of trees – Physical change
4. Dissolving salt in water – Physical change
5. Digestion of food – Chemical change
6. Melting of ice- Physical change