CBSE Science Class 8

Microorganisms

Microorganisms - Chapter Wise CBSE Solved Question and Answer Based On NCERT

Short Q&A:

Q1: Write short notes on
  • Bacteria
  • Viruses
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Q2: Write short notes on
  • Protozoa
  • Algae
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Q3: What do you mean by friendly microbes?
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Q4: How curd is formed?
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Q5: Why yeast is used in the baking industry for making bread, cakes and pastries?
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Q6: Define the process of fermentation and its application.
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Q7: How antibiotics are related to microorganisms.
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Q8: Why vaccines are important?
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Q9: What is the main motto of pulse polio program?
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Q10: Write short notes on medicinal use of microorganisms.
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Q11: Write short notes on increasing soil fertility by the action of microorganisms.
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Q12: How do microbes clean our environment?
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Q13: Why some microorganisms are considered as harmful?
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Q14: List all possible ways by which pathogens can enter our body.
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Q15: Define communicable diseases with examples.
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Q16: Why we should keep a handkerchief on the nose and mouth while sneezing?
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Q17: How does housefly spread diseases?
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Q18: Why should we avoid consuming uncovered food items?
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Q19: Write short notes on diseases causing microorganisms in animals.
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Q20: Write short notes on diseases causing microorganisms in plants.
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Q21: Neha went to a party n she ate a variety of foodstuff there, on reaching home she started vomiting and had stomach ache. What do you think why it is so?
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Q22: How do we preserve cooked food at home?
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Q23: Why a mango gets spoilt and rotten after few days but a mango pickle does not spoil for a long period of time?
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Q24: What are preservatives and their importance?
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Q25: What kind of food stuffs can be preserved by using common salt?
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Q26: What kind of food stuffs can be preserved by using sugar?
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Q27: What kind of food stuffs can be preserved by using oil and vinegar?
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Q28: Why milk is boiled before storage or consuming?
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Q29: What are the advantages of sealed air tight packing for storage of food items?
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Q30: What is nitrogen cycle?
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Chapter 2 Microorganisms