CBSE  /  Class 8  /  Science  /  Conservation of Plants and Animals

  • 1. 
    The clearing of forests is referred to as

  • reforestation
  • desertification
  • deforestation
  • sanitation

  • 2. 
    Deforestation leads to

  • an increase in the temperature of the earth
  • imbalance of O2 and CO2
  • increase in rainfall
  • both (a) and (b)

  • 3. 
    Which of the following gases is needed by plants for photosynthesis?

  • Oxygen
  • Nitrogen
  • Carbon dioxide
  • Sulphur

  • 4. 
    Name the process undertaken by plants for preparing their own food.

  • Industrialisation
  • Photosynthesis
  • Stealing
  • Sterilisation

  • 5. 
    An increase in the amount of carbon dioxide results in

  • winter season
  • global warming
  • rainfall
  • all of these

  • 6. 
    The reduction in rainfall could cause

  • droughts
  • cold
  • greenery
  • none of these

  • 7. 
    The removal of top layer of soil leads to

  • desertification
  • rainfall
  • snowfall
  • deforestation

  • 8. 
    Name the sphere that supports life, and where living organisms exist.

  • Atmosphere
  • Lithosphere
  • Biosphere
  • None of these

  • 9. 
    The variety of organisms living on the earth, is referred to as

  • biodiversity
  • food chain
  • lithosphere
  • relationship

  • 10. 
    Name a biosphere reserve where the plants and animals are similar to those of the upper Himalayan ranges and lower western ghats.

  • Nanda Devi Biosphere Reserve
  • Kaziranga Biosphere Reserve
  • Pachmarhi Biosphere Reserve
  • Dudhwa National Park
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