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Microorganisms class 8 Notes Science in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Microorganisms class 8 Notes Science latest chapter wise notes for quick preparation of CBSE exams and school-based annual examinations. Class 8 Science notes on chapter 2 Microorganisms Science are also available for download in CBSE Guide website.
Class 8 Science notes Chapter 2 Microorganisms
Download CBSE class 8th revision notes for chapter 2 Microorganisms in PDF format for free. Download revision notes for Microorganisms class 8 Notes and score high in exams. These are the Microorganisms class 8 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter 2 in minutes. Revision notes in exam days is one of the best tips recommended by teachers during exam days.
Class 8 Revision Notes Science Microorganisms
- Micro-organisms: Micro-organisms are too small and are not visible to the unaided eye.
- They can survive under all types of environment, ranging from ice cold climate to hot springs and deserts to marshy lands. They are also found inside the bodies of animals including humans.
- Micro-organisms are found in air, water and in the bodies of plants and animals.
- They may be unicellular or multicellular.
- Micro-organisms are classified into four major groups. These groups are bacteria, fungi, protozoa and some algae.
- Viruses are quite different from other micro-organisms. They reproduce only inside the host organism; bacterium, plant or animal cell.
- Based on the significance, micro-organisms can be useful or harmful to us.
Uses of microorganisms
- Protozoan cause serious diseases like dysentery and malaria.
- Some bacteria and blue-green algae present in the soil fix nitrogen from the atmosphere and convert into nitrogenous compounds.
- Certain bacteria convert compounds of nitrogen present in the soil into nitrogen gas which is released to the atmosphere.
- Pathogens: Some of the microorganisms cause diseases in human beings, plants and animals. Such disease-causing microorganisms are called pathogens.
- Cleaning of Environment: The microorganisms decompose dead organic waste of plants and animals converting them into simple substances. These substances are again used by other plants and animals. Microorganisms can be used to degrade the harmful and smelly substances and thereby clean up the environment.
CBSE Class-8 Revision Notes and Key Points
Microorganisms class 8 Notes Science. CBSE quick revision note for class-8 Science, Chemistry, Math’s, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.
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