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) Cooking of food- Chemical change
(ii) Boiling of water- physical change
(iii) Cutting of trees- Physical change
(iv) Dissolving salt in water- Physical change
(v) Digestion of food- Chemical change
(vi) Melting of ice- physical change.