One day, when Sam and Joey walked past a fresh juice shop, Sam noticed that some apples were cut into pieces and stored in a tank of water before use.
(a) Sam thought that the shopkeeper stored the cut apples in water in order to extract more juice for better profits. Explain the biological principle behind Sam’s idea. (3 marks)
(b) Joey disagreed with Sam because she found that the shopkeeper also stored whole apples in water tanks. Explain why this observation provides Joey with evidence to oppose Sam’s idea. (2 marks)
(c) Suggest one possible hygienic problem of storing the cut pears in water tanks. (1 mark)
(a) Sam thought that the shopkeeper stored the cut apples in water in order to extract more juice for better profits. Explain the biological principle behind Sam’s idea. (3 marks)
(b) Joey disagreed with Sam because she found that the shopkeeper also stored whole apples in water tanks. Explain why this observation provides Joey with evidence to oppose Sam’s idea. (2 marks)
(c) Suggest one possible hygienic problem of storing the cut pears in water tanks. (1 mark)
2 則留言:
i am wendy hui ka yee from 4S2
好難...唔多識答...因為我覺得 d cut apple is put into water...d sucrose 就會 osmosis 去d water到...咁好似冇乜可能有多d juice wor - -' 可唔可以post埋個答案??
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