CBSE Questions for Class 9 Biology Natural Resources Quiz 4 - MCQExams.com

Which of the following prevents soil erosion?
  • Animals
  • Rocks
  • Plants
  • Mountains
Soil erosion is caused due to:
  • Strong winds
  • Heavy rains
  • Keeping the fields fallow for a long time
  • All of the above
What is the origin of the energy that drives the water cycle?
  • Trees
  • Water
  • Mountains
  • Sun
Nitrogen fixation can be done by:
  • Industries
  • Rhizobium
  • Lightning
  • All of the above
The major source of formation of soil is:
  • Rocks
  • Snow covered mountains
  • River beds
  • Volcanoes
The presence of lichens in an area, indicates ___________ area.
  • Clean
  • Polluted
  • Oxygen-rich 
  • Crowded
CO$$_2$$ absorbs some of the ......... that radiates from the surface of Earth to space 
  • Ozone
  • Heat
  • Ultraviolet light
  • Smog
Sun, water, wind and living organisms are main factors that influence the formation of soil from the rocks.
  • True
  • False
The process of losing water by plants is called ____________.
  • Sublimation
  • Transpiration
  • Condensation
  • Translocation
The part of earth comprising water is called an  
  • Atmosphere
  • Hydrosphere
  • Lithosphere
  • None of the above
The ozone layer in our atmosphere protects us from the bad effects of:
  • Carbon dioxide
  • CFC's
  • The sun's ultraviolet rays
  • All of the above
Which gas has the highest percentage in air?
  • Nitrogen
  • Oxygen
  • Carbon dioxide
  • Carbon monoxide
Conserving the environment means _______________.
  • not destroying natural resources
  • not lowering the quality of the environment
  • exploiting natural resources 
  • preserving the condition of the nature that has been destroyed
Which of the following is not true about biogas?
  • It contains methane
  • Burns without smoke
  • Leaves ash behind
  • Produced by anaerobic decomposition of animal and plant waste
More soil erosion occurs where there is
  • No rainfall
  • Low rainfall
  • High rainfail
  • None of the above
Certain gases in the atmosphere known as a greenhouse gas that absorb and emit heat and contributes to global warming. Which of the following gases is not considered in the list of gases known to have a greenhouse effect?
  • Carbon dioxide (CO$$_2$$)
  • Oxygen ( $$O_2$$)
  • Ozone (O$$_3$$)
  • Nitrous oxide (NO)
The upper most weathered layer of earth's crust is:
  • Sand
  • Organic matter
  • Soil
  • Minerals
Which of the following factor does not help in the formation of soil?
  • Wind and water
  • Decomposed plants and animals
  • Rocks and temperature
  • Water accumulation
Which of the following phenomena could expose the top layer of soil?
  • Deforestation
  • Aforestation
  • Farming
  • Building dam
What is the largest source of freshwater for our planet?
  • Lakes and streams
  • Polar icecaps and glaciers
  • Rivers
  • Underground
Ultraviolet radiation from sunlight causes the reaction that produces:
  • $$SO_2$$
  • CO
  • Ozone
  • Fluorides
A good soil:
  • Allows limited amount of water into it.
  • Allows the water to percolate slowly into it.
  • Allows water to pass quickly through it.
  • Holds a lot of water.
Plants and animals help in maintaining the balance of
  • Trees and animals
  • Oxygen and carbon dioxide
  • Green plants and plant eaters
  • Water and minerals
The natural formation of ammonia in soil by the action of bacteria on proteins in decaying organic matter is called
  • Nitrification
  • Denitrication
  • Ammonification
  • Denaturation
Increase in the percentage of fauna and decrease in flora may be dangerous because it enhances
  • Percentage of $$CO_2$$
  • Percentage of radioactive fallout
  • Percentage of diseases
  • Percentage of $$O_2$$
Which of the following environment is richest in free oxygen?
  • Warm fresh water
  • Atmosphere
  • Cold fresh water
  • Salt water
If there was no carbon dioxide in the earth's atmosphere, the temperature of the earth would be
  • Higher than the present
  • Dependent on the amount of oxygen in the atmosphere
  • Less than the present
  • The same
Denitrification is the _______________.
  • Reduction of NO$$_2$$ to ammonia by bacteria in the soil
  • Conversion of ammonia to amino acids
  • Conversion of ammonia and nitrates to gaseous nitrogen
  • Oxidation of ammonia to nitrate
The water cycle is mainly driven by:
  • Only plants 
  • Plants and rocks
  • Heat and gravity
  • Only animals
Ozone, shields the earth from the harmful ultraviolet rays from the
  • Moon
  • Mars
  • Sun
  • None of these
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 9 Biology Quiz Questions and Answers