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Natural Resources Test - 15

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Natural Resources Test - 15
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Conversion of organic nitrogenous compounds into ammonium compound is called:
    Solution
    Formation of ammonia from the organic nitrogenous compounds is called as ammonification. The dead remains of plants and animals contribute to the source of amonification. It is an important step in the nitrogen cycle. Nitrification is the process of conversion of ammonia into nitrate ions through nitrites.
    So, the correct answer is option B.
  • Question 2
    1 / -0
    The instrument which measures wind velocity is:
    Solution
    • Anemometer is the instrument used to measure wind velocity.
    • Hydrometer measures specific gravity (or relative density) of liquids.
    • Barometer is used to measure atmospheric pressure.
    • Lactometer measures cream content of milk.
    So, the correct answer is 'B'.
  • Question 3
    1 / -0
    Humus is found in:
    Solution
    Humus is found at the top of the soil structures. It is dark coloured and spongy, which is rich in mineral and organic matter and shows maximum biological activity. It is formed by the decomposition of leaves and other plant material by soil microorganisms.
    So, the correct option is A.
  • Question 4
    1 / -0
    Increase of temperature due to scattering of energy is by ozone, CO$$_2$$ and water vapour, is known as
    Solution
    Global warming is the overheating of the earth due to the increased concentration of greenhouse gasses. Greenhouse gasses generally traps the radiations of the earth which leads to increase in the temperature of the earth and global warming. The greenhouse gasses includes water vapor, carbon dioxide, methane, nitrous oxide, and ozone. 
  • Question 5
    1 / -0
    The sphere of living matter together with water, air and soil on the surface of the earth is

    Solution
    • The abiotic {non-living) and biotic (living) components together constitute the biosphere. 
    • The abiotic component is composed of the air (atmosphere), earth (lithosphere) and water (hydrosphere).

  • Question 6
    1 / -0
    Which is not dangerous for life?
    Solution
    A nuclear blast can cause the release of radiations which can cause cancer and the radioactive materials can lead to soil pollution. 
    Deforestation results in soil erosion and the quality of soil is degraded in which the plants cannot grow. 
    Biological pollution (impacts or bio pollution) is the impact of humanity's actions on the quality of the aquatic and terrestrial environment. Specifically, biological pollution is the introduction of non-indigenous and invasive species.
    Ozone layer is present in the stratosphere over the Earths surface. This is a protective layer which prevents the entry of the harmful UV rays from the sun into the atmosphere. 
    Thus, the correct answer is option D.  
  • Question 7
    1 / -0
    Ozone hole means
    Solution
    • Due to the depletion of stratospheric ozone, a seasonal hole in the ozone layer at polar regions is formed in the atmosphere. This is known as the ozone hole. 
    • The depletion of ozone causes harmful UV rays to reach the earth. UV radiations are responsible for causing skin cancers and various diseases in humans.
    So, the correct answer is option C.
  • Question 8
    1 / -0
    The percentage of oxygen in air is:
    Solution
    Air is a mixture of gases. It contains 78-79% nitrogen, 21 % oxygen, 0.93% argon, 0.03% carbon dioxide, and traces of hydrogen, helium, and other "noble" gases. So, the correct answer is option C.
  • Question 9
    1 / -0
    Soil is a mixture of:
    Solution
    • Soil is the uppermost humus containing part of the Earth's surface, which can sustain terrestrial plant life. 
    • Soil is composed of inorganic mineral particles (45 percent), water (25 percent), air (25 percent), and humus (5 percent). 
    • Humus is composed up of dead and decaying organic material. 
    Thus, the correct answer is option D.
  • Question 10
    1 / -0
    Why there is a need of man-made resources?
    Solution
    All the natural resources are not unlimited in number. With the advancement of civilization man has become more social and increase in population raised the demand for the natural resources. So man-made resource has come as an alternative and gave more comforts to the humankind.
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