Olympiad – Class VII – Science - Bio - Soil

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Question - 1

Which of these is a part of soil that is most helpful to the growth of plants?

  • A Humus
  • B Sand
  • C Clay
  • D Small porous rocks

Question - 2

Which of these are present in the soil and required for the growth of crops?

  • A Chemicals
  • B Pesticides
  • C Fertilisers
  • D Mineral nutrients

Question - 3

Which of the following sequences show the correct arrangement of different layers of the soil?

  • A
  • B
  • C
  • D

Question - 4

Which of the following layers of the soil contain more humus?

  • A Top soil
  • B Subsoil
  • C Bed rock
  • D Both (B) and (C)

Question - 5

In which of the following agricultural methods different types of crops are grown in a piece of land season after season?

  • A Monoculture
  • B Irrigation
  • C Crop rotation
  • D Manuring

Question - 6

Fungi and bacteria grow mostly in which layer of soil?

  • A Subsoil
  • B Top soil
  • C Bed rock
  • D All the above

Question - 7

Which of the following worms live in the soil?

  • A Ringworm
  • B Flatworm
  • C Earthworm
  • D Silkworm

Question - 8

Which of the following helps in soil formation?

  • A Formation of rocks
  • B Arrangement of layers of sand
  • C Breaking down of rocks
  • D Arrangement of rocks.

Question - 9

Which of the following is also called soil profile?

  • A Composition of the soil
  • B Texture of the soil.
  • C Layers of the soil
  • D Moisture content in the soil

Question - 10

Which layer of soil provides shelter for many living organisms?

  • A A-Horizon
  • B B-Horizon
  • C C-Horizon
  • D Mineral