CBSE  /  Class 7  /  Science  /  Soil

  • 1. 
    Which one of the following is a step in the formation of soil?

  • Earthquakes or volcanic eruptions
  • Weathering of rocks
  • Addition of humus
  • All are involved in the formation of soil

  • 2. 
    In which horizon of soil minerals are found?

  • A
  • B
  • C
  • None of these

  • 3. 
    Which physical property of soil is important to us?

  • Texture
  • Water holding capacity
  • Both of these
  • None of these

  • 4. 
    Which of the following type of soil will form a colloidal solution when suspended in water?

  • Clay
  • Silt
  • Sand
  • Gravel

  • 5. 
    Which factor influences soil formation?

  • Climate
  • Vegetation
  • Parent rock
  • All of these

  • 6. 
    The proportion of sand, silt and clay in a soil sample determines

  • structure
  • texture
  • nutrient potential
  • fertility level

  • 7. 
    The microorganisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients.

  • Desert
  • Forest
  • Open field
  • Cricket ground

  • 8. 
    Availability of water and minerals in the soil for maximum absorption by roots is in the:

  • B-horizon
  • C-horizon
  • A-horizon
  • Surface of soil

  • 9. 
    Soil conservation measures are mainly aimed at protecting which of the following?

  • Plants
  • Topsoil
  • Sub soil
  • Soil organisms
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