Science Term 3 Our Environment Full Chapter Material

6th Standard

    Reg.No. :
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Science

Time : 01:30:00 Hrs
Total Marks : 60
    5 x 1 = 5
  1. Identify the fresh water ecosystem

    (a)

    Pond

    (b)

    Lake

    (c)

    River

    (d)

    All of them

  2. Producers are________

    (a)

    Animals

    (b)

    Birds

    (c)

    Plants

    (d)

    Snakes

  3. It is a biodegradable waste.

    (a)

    Plastic

    (b)

    Coconut Shell

    (c)

    Glass

    (d)

    Aluminium

  4. It is an undesirable change that occurs in air and water.

    (a)

    Recycling

    (b)

    Reuse

    (c)

    Pollution

    (d)

    Reduce

  5. Usage of chemical pesticides and fertilisers causes ________ pollution.

    (a)

    Air pollution

    (b)

    Water pollution

    (c)

    Noise pollution

    (d)

    None of the above

  6. 5 x 1 = 5
  7. Primary consumers that eat plants are called _________.

    ()

    herbivorous

  8. Temperature, light and wind are ________ factors.

    ()

    abiotic

  9. __________ is the process of converting waste materials into new materials.

    ()

    Recycling

  10. Water pollution can spread __________ and chemicals.

    ()

    diseases

  11. The 3R’s are Reduce, __________ and Recycle.

    ()

     Reuse

  12. 5 x 1 = 5
  13. Biotic factor

  14. (1)

    Air pollution

  15. Sewage

  16. (2)

    Water Pollution

  17. Fertilizers

  18. (3)

    Terrestrial Ecosystem

  19. Desert

  20. (4)

    Land pollution

  21. Smoke

  22. (5)

    Animals

    5 x 2 = 10
  23. Define ecosystem.

  24. Write any two things that can be recycled.

  25. What are the types of pollution.

  26. Give one example of a food chain in an aquatic ecosystem?

  27. Name some pollutants.

  28. 2 x 5 = 10
  29. Give two examples of how you can avoid or reduce waste?

  30. Write a short note on noise pollution.

  31. 5 x 1 = 5
  32. The Pacific ocean is an example of an aquatic ecosystem.

    (a) True
    (b) False
  33. Bacteria and fungi are called decomposers.

    (a) True
    (b) False
  34. Human and animal wastes are examples of non-biodegradable waste.

    (a) True
    (b) False
  35. Excessive use of pesticides leads to air pollution.

    (a) True
    (b) False
  36. In schools, waste management rules say that we should separate waste in two categories.

    (a) True
    (b) False
  37. 5 x 3 = 15
  38. What is biodegradable waste?

  39. How can we reduce water pollution?

  40. Write the importance of the food chain.

  41. What would happen if an organism is removed from the food chain?

  42. Explain the link between waste and dangerous diseases like dengue and malaria?

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