This presentation is a revision for biology class 8 prepared by myself, CHITHRAPOURNAMi, an 8th standard student. It contains 2 chapters. Hope it will will be helpful for all students.

1. BIOLOGY
REVISION

3. 1. Two processes discovered by
Louis Pasteur are

4. The Answer is:
Fermentation and Pasteurisation

5. 2. The method of _____________is used
to preserve amla, raw mangoes,
tamarind, etc.

6. The Answer is:
Salting

7. 3._________ are on the borderline of
living and non-living.

8. The Answer is:
Viruses

9. 4. Two diseases caused by
Protozoans

10. The Answer is:
Dysentery and Malaria

11. 5. Serious diseases caused by
Viruses

12. The Answer is:
Polio and Chicken Pox

13. 6._______________ Bacteria promotes
the formation of curd

14. The Answer is:
Lactobacillus

15. 7. The vaccine for Small Pox was
discovered by __________________ in the
year_____

16. The Answer is:
Edward Jenner, 1798

17. 8.Disease-causing microorganisms
are called___________

18. The Answer is:
Pathogens

19. 9. Name any 3 single-celled
organisms

20. The Answer is:
Bacteria, some algae and protozoa

21. 10. Rust of wheat in plants is caused
by _________

22. The Answer is:
Fungi

24. 1. When plants of the same kind are
grown and cultivated at one place on
a large scale, it is called a ______

25. The Answer is:
Crop

26. 2. The activities undertaken by
farmers over a period of time for the
cultivation of crops are referred to
as __________________________

27. The Answer is:
Agriculture practices

28. 3. The process of loosening and
turning the soil is called__________

29. The Answer is:
Tilling or Ploughing

30. 4. Sowing by using a ____________ saves
time and labour

31. The Answer is:
Seed Drill

32. 5._________ is an organic substance
obtained by the decomposition of
plant or animal wastes

33. The Answer is:
Manure

34. 6. 3 methods by which we can
maintain the fertility of the soil

35. The Answer is:
Adding Manure, Field Fallow or
Crop rotation

36. 7. Plants contain____% water.

37. The Answer is:
90%

38. 8. Weeds can be controlled by using
chemicals called ___________

39. The Answer is:
Weedicides

40. 9. The cutting of crop after it is
mature is called_________

41. The Answer is:
Harvesting

42. 10. The first step before growing of
crops is__________

43. The Answer is:
Preparation of soil

45. This Biology Revision Quiz was
prepared by:
Chithrapournami