(1) Explain the different methods of food preservation. Give one example of each.
(2) What are the advantages of food preservation?
(3)How is nitrogen fixed during lightning?
(4) Describe the nitrogen cycle. Support your answer with a diagram
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Answer:
drying eg: dry grapes
freezing eg: ice
storing eg: rice
canning eg: to kill insects, neem etc
pasteurization eg: milk
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