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How is chewing food different from digesting it?

Answer and explanation

Correct answer: Chewing mainly breaks food into smaller pieces, whereas digestion converts complex food substances into simpler new substances.

Chewing is mainly a physical change because it breaks food into smaller pieces while its chemical composition essentially remains the same. In digestion, enzymes convert complex substances such as carbohydrates, proteins, and fats into simpler substances such as glucose, amino acids, and fatty acids with glycerol. Therefore, digestion involves chemical change. Option B is incorrect because digestion is not limited to reducing the size of food particles.

Related tags

Class 10 ScienceChemical ReactionsPhysical ChangeChemical ChangeDigestionEnzymes

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