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Chapter 2 Class 8 - Microorganisms : Friend and Foe

Learn the chapter Microorganisms: Friend and Foe with Notes, solutions to NCERT Questions and Extra Questions. It is Chapter 2 Class 8 Science of the NCERT Book.


In this chapter, we will learn

  • What are Microorganisms?
  • Different Types of Microorganisms - like Bacteria, Protozoa, Algae, Fungi and Virus. Their figure, examples and definition are also explained
  • Then, we will learn about some basic facts about them. Like
    • Are microorganisms unicellular or multicellular
    • Where do microorganisms live
    • Are microorganisms good for us, or are bad for us?
  • Some important uses of Microorganisms - in making curd, bread, alcohol, medicines, agriculture
  • Harmful Microorganisms like Pathogens - which causes diseases in Humans, Animals and Plants
  • The Disease caused by microorganism, which microorganisms caused it, and how is it transmitted
  • Then, we will learn about Food Poisoning
  • A basic introduction about Food Preservation
  • And finally, we will learn about what is Nitrogen Fixation
  • And What Nitrogen Cycle is

In addition to this, we have added some important questions... which you can check in the Extra Question section below.


Click on a link below to start doing the chapter


NCERT Questions

Teachoo Questions