Question

25 chemical change and physical change

Answer 1

Burning woodSouring milkMixing acid and baseDigesting foodCooking an eggHeating sugar to form caramelBaking a cakeRusting of iron

Crumpling a sheet of aluminum foilMelting an ice cubeCasting silver in a moldBreaking a bottleBoiling waterEvaporating alcoholShredding paperSublimation of dry ice into carbon dioxide vapor

Answer 2

physical changes:-crushing a can, melting of an ice cube,boiling water, mixing sand and water, breaking a glass, dissolving sugar and water, shredding paper,chopping wood,mixing red and green marbles, sublimation of dry ice,cutting a paper,melting of wax etc.

chemical changes:-burning wood, souring milk,mixing acid and base,digesting food,cooking an egg,heating sugar to form caramel, baking a cake,rusting of iron, mixing salt in water,rusting of iron,metabolism of food in the body,cooking an egg etc.
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