Question

Explain the following statement: Digestion is a chemical change.

Answer 1

1. When we eat, our mouth physically break down food into small pieces.
2. Mechanical digestion occurs in the mouth, stomach and small intestine.
3. Food is chemically changed in digestion when new, smaller substances are formed.
4. Moreover, we will never be able to get back the raw material in the same form as it was before.
5. Digestion of food is a permanent change which is irreversible.