Total Earth’s surface covered by water is
  • 75%
  • 60%
  • 85%
  • 50%
Biotic component of the biosphere is not constituted by
  • producers
  • consumers
  • decomposer
  • air
An increase in carbon dioxide content in the atmosphere would not cause
  • more heat to be retained by the environment
  • increase in photosynthesis in plants
  • global warming
  • abundance of desert plants
Oxygen is returned to the atmosphere mainly by
  • burning of fossil fuel
  • respiration
  • photosynthesis
  • fungi
Low visibility during cold weather is due to
  • formation of fossil fuel
  • unbumt carbon particles or hydrocarbons suspended in air
  • lack of adequate power supply
  • none of these
Growth of lichens on barren rocks is followed by the growth of
  • moss
  • ferns
  • gymnosperms
  • algae
Marked temperature changes in an aquatic environment can affect
  • breeding of animals
  • more growth of aquatic plants
  • process of digestion in animals
  • availability of nutrients.
Soil erosion can be prevented by
  • raising forests
  • deforestation
  • excessive use of fertiliser
  • overgrazing by animals
What happens when rain falls on soil without vegetational cover?
  • Rain water percolates in soil efficiently
  • Rain water causes loss of surface soil
  • Rain water leads to fertility of the soil
  • Rain water does not cause any change in soil
Oxygen is harmful for
  • ferns
  • nitrogen fixing bacteria
  • chara
  • mango tree
Soil erosion can be prevented by
  • High speed wind
  • overgrazing by animals
  • excessive use of fertilizer
  • raising forests
which of the below microorganism is not used in Nitrogen fixation?
  • Rihzobium
  • Azotobactor
  • Blue gree algae
  • Nitrosomonas
Ozone layer protect us from
  • Gamma Rays
  • UV rays
  • X rays
  • None of these
A zone where life forms exits is called
  • Atnosphere
  • Lithopshere
  • Biosphere
  • None of these
Biotic component of biosphere is not constituted by
  • producers
  • wate
  • consumers
  • decomposer
Match the column
natural-resources-mcq-1.png
  • p -> iv, q->i, r ->iii, s-> ii
  • p -> iii, q->i, r ->ii, s-> iv
  • p -> iv, q->ii, r ->i, s-> iii
  • p -> iv, q->i, r ->ii, s-> iii
Total earth’s surface covered by water is
  • 50%
  • 85%
  • 65%
  • 75%
Match the column
natural-resources-mcq-4.png
  • p -> ii, q-> i, r -> iii
  • p -> ii, q-> iii, r -> i
  • p -> i, q-> iii, r -> ii
  • p -> iii, q-> ii, r -> i
Choose the correct sequences
  • $CO_2$ in atmosphere -> decomposers -> organic carbon in animals -> organic carbon in plants
  • $CO_2$ in atmosphere -> organic carbon in plants -> organic carbon in animals -> inorganic carbon in soil
  • Inorganic carbonates in water -> organic carbon in plants -> organic carbon in animals -> scavengers
  • Organic carbon in animals -> decomposers -> $CO_2$ in atmosphere -> organic carbon in plants
Which of these is not inexhaustible natural resource?
  • Solar energy
  • Air
  • Water
  • Soil
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