Quiz  /  Environmental studies Class 8 MCQ Questions With Answers

  • 1. 
    In complex ecosystems the degree of species diversity is

  • poor
  • high
  • medium
  • none

  • 2. 
    Which of the following conceptual spheres of the environment is having the least storage capacity for matter?

  • Atmosphere
  • Lithosphere
  • Hydrosphere
  • Biosphere

  • 3. 
    Ultra-violet radiation is absorbed and removed by

  • Ozone
  • Oxygen
  • Carbondioxide
  • Carbon tetrachloride

  • 4. 
    Air pollution is _________________

  • the addition of any substance that has harmful or toxic effects to air
  • the addition of any good substance that benefits air
  • a chemical reaction

  • 5. 
    Which of the following is a biotic component of an ecosystem?

  • Fungi
  • solar light
  • temperature
  • humidity

  • 6. 
    The organisms who directly feed on producers are called

  • Herbivores
  • Carnivores
  • Decomposers
  • Saprophytes

  • 7. 
    Which of the following components of the environment are effective transporters of matter?

  • Atmosphere and Hydrosphere
  • Atmosphere and Lithosphere
  • Hydrosphere and Lithosphere
  • Biosphere and Lithosphere

  • 8. 
    The impact of construction of dams

  • Submerges forest
  • Loss of wild life habitat
  • Damages down stream ecosystem
  • all of the above

  • 9. 
    Atmosphere consists of 79 per cent Nitrogen and 21 per cent Oxygen by

  • volume
  • weight
  • density
  • all the three

  • 10. 
    The adverse effect of modern agriculture is

  • water pollution
  • soil degradation
  • water logging
  • all of the above

  • 11. 
    Water logging is a phenomena in which

  • Crop patterns are rotated
  • Soil root zone becomes saturated due to over irrigation
  • Erosion of soil
  • none of above

  • 12. 
    Which of the following is a producer in an ecosystem

  • Plants and some bacteria capable of producing their own food
  • Animals
  • Human beings
  • Fish

  • 13. 
    Power generation by following mode is least polluting

  • Coal
  • Oil
  • Natural gas
  • Hydro energy

  • 14. 
    Biosphere is

  • The solid shell of inorganic materials on the surface of the earth
  • The thin shell of organic matter on the surface of earth comprising of all the living things
  • the sphere which occupies the maximum volume of all of the spheres
  • all of the above

  • 15. 
    In an ecosystem, the flow of energy is

  • Bidirectional
  • cyclic
  • unidirectional
  • multidirectional

  • 16. 
    Energy and manure are generated by

  • Nuclear plants
  • Thermal plants
  • Biogas plants
  • Hydroelectric plants

  • 17. 
    The sequence of eating and being eaten in an ecosystem is called

  • Food Chain
  • carbon cycle
  • hydrological cycle
  • anthroposystem

  • 18. 
    The objective of environmental education is

  • Raise consciousness about environmental conditions
  • To teach environmentally appropriate behaviour
  • Create an environmental ethic
  • All of the above
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