chemical and physical changes
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Answer:
Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc. Generally, physical changes do not involve the production of energy.
Answer:
Physical change:-
A change that changes only the physical traits of the substance, without making any change in their internal structure. Examples of physical change include: boiling of water, chopping wood, dissolving sugar in water, crumpling of paper, melting an ice cube, etc.
Chemical change :-
A change that changes by affecting the internal structure of the substance to form a new substance. Examples of chemical change include: digesting food, burning wood, baking a cake, curdling of milk, mixing acid, boiling an egg, rusting of iron, etc