Microorganisms · सूक्ष्मजीव
Curd or cholera? Sort the useful and harmful microbes.
Microorganisms games
Microorganisms (microbes)
Living things too small to see without a microscope: bacteria, fungi, protozoa, algae and viruses.
| Useful | Harmful |
|---|---|
| Curd (Lactobacillus), bread and idli (yeast), antibiotics (penicillin), vaccines, compost, nitrogen fixing (Rhizobium) | Diseases: cholera, typhoid, TB (bacteria); malaria (protozoa); cold, flu, polio, chickenpox (viruses); food spoiling; crop diseases |
Food preservation: salt, sugar, oil, vinegar, heating (pasteurised milk), cold storage, drying.
For Class 7 and 8 (NCERT Curiosity 8, “The Invisible Living World”).
A one-page chart to stick on the wall, and a worksheet to practise.
Microorganisms
Microorganisms (microbes)
Living things too small to see without a microscope: bacteria, fungi, protozoa, algae and viruses.
| Useful | Harmful |
|---|---|
| Curd (Lactobacillus), bread and idli (yeast), antibiotics (penicillin), vaccines, compost, nitrogen fixing (Rhizobium) | Diseases: cholera, typhoid, TB (bacteria); malaria (protozoa); cold, flu, polio, chickenpox (viruses); food spoiling; crop diseases |
Food preservation: salt, sugar, oil, vinegar, heating (pasteurised milk), cold storage, drying.
kheloaurseekho.in — free charts, games and worksheets
Microorganisms — worksheet
Name: ____________________ Class: ______ Date: __________
1. Name the five groups of microorganisms.
2. Write three uses of microbes.
3. Malaria is caused by ______ and spread by ______.
4. Write three ways to preserve food.
kheloaurseekho.in — free charts, games and worksheets
