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You are here: Home / Class 8 / Micro-organism:Friend and Foe / Preservation of food

Preservation of food

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 3 Comments

Question 1 What is meant by food preservation?

Question 2 Name methods of preserving food?

  • NCERT Solutions Class 8 Science

Preservation of food

The food material like milk,fruits,vegetables,meat,fish and cooked food get spoiled easily.This is because they contain a lot of water due to which the food-spoiling micro-organism can grow in them easily.

The process in which the food materials are given a suitable physical or chemical treatment to prevent their spoilage is called food preservation.

Methods of preserving food 

1)Sun-drying or dehydration

2)Heating

3)Cooling

4)Deep freezing

5)Addition of common salt

6)Addition of sugar

7)Addition of mustard oil and vinegar

8)Use of special chemical preservatives

9)Pasteurisation

10)Packing food in air-tight packets

See other topics from Chapter 2 Micro Organisms Friend and Foe
  • Micro-Organisms
  • Groups of Micro Organism
  • Where do Micro Organism Live
  • Useful Micro organism
  • Making of Curd and Bread
  • Commercial Use of Micro organism
  • Medicinal Use of Micro oragnaism
  • Increasing Soil Fertility
  • Cleaning the Environment
  • Harmful Micro Organism
  • Carriers of Disease causing micro organism
  • Disease Causing Micro organisms in Animals
  • Disease Causing Micro-Organism in Plants
  • Food poisoning
  • Preservation by sun-drying, Heating, Cooling
  • Preservation by Deep Freezing,Common Salt, Sugar
  • Preservation of food by mustard oil and Vinegar, Chemicals, Pasteurisation, Air-tight Packets
  • Nitrogen Fixation
  • Nitrogen Cycle

Filed Under: Class 8, Micro-organism:Friend and Foe Tagged With: food reservation

About Mrs Shilpi Nagpal

Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading Free Education to everyone.

Reader Interactions

Comments

  1. Anand says

    July 1, 2018 at 4:50 pm

    What are preservatives

    Reply
  2. Devendra kumar says

    July 18, 2019 at 5:54 pm

    It is very helpful article. This very good information.

    Reply
  3. Jeevika kumawat says

    December 29, 2020 at 10:33 am

    It’s very nice website .
    Most of the answer are useful and easy to learn.
    Thank you for this website.

    Reply

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