ANSWER IN BRIEF
1. What do you mean by food preservation? Why we have to
preserve food?
2. What do you mean by Pasteurisation?
3. What you mean by Nitrogen fixation? State two ways in
which Nitrogen can be fixed in nature.
4. Make a flow chart to explain the food preservation
techniques
5. Draw a neat labelled Diagram of nitrogen cycle
Answers
Explanation:
1. Preservation of food means to keep food safe from pest and pathogens
Its done so that food can be used after sometime also
2. Boiling milk and then suddenly cooling it
It was discovered by louis pasture
3. Converting atm nitrogen to plant soulble form
4 and 5 sorry for those
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Answer:
1. Food preservation, any of a number of methods by which food is kept from spoilage after harvest or slaughter. Such practices date to prehistoric times. Among the oldest methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation, and the addition of chemicals. Advances in packaging materials have played an important role in modern food preservation
2. Pasteurization (or pasteurisation) is a process of heat processing a liquid or a food to kill pathogenic bacteria to make the food safe to eat. It involves heating the food to kill most harmful microorganisms. Producers pasteurize dairy and other foods to make them safe to eat. The process is named after Louis Pasteur.
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