SC-1243
Physical and chemical changes
Lower Sec Science · Secondary 2 · Easy · Physical and chemical changes
A boy chews a piece of bread in his mouth before swallowing it.
Which process is mainly taking place during the chewing of the bread?
Which process is mainly taking place during the chewing of the bread?
- Physical digestion, because the bread is only broken into smaller pieces.
- Chemical digestion, because new substances are formed immediately.
- Physical digestion, because nutrients are absorbed into the blood.
- Chemical digestion, because the taste of the bread changes.
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