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Natural Resources Test - 5

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Natural Resources Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0
    _________ is/are the main source(s) of water in rivers, lakes, ponds, seas and oceans.
    Solution
    Most of the rainwater flows into rivers and some of it gets collected in lakes, ponds and streams. Rivers flow into seas and water from seas merges into oceans.
    Snow on high mountains melts to form water, which flows down the slopes and is collected in rivers, streams and lakes.
    Hence, option (4) is the most appropriate.
  • Question 2
    1 / -0
    The main source(s) of water for inland lakes is/are
    Solution
    The source of water in lakes, reservoirs, and ponds may be rivers, streams, groundwater, rainfall, melting snow runoff, or a combination of these.
    Lakes are supplied with water by rainfall that falls directly on the surface of the lake, by water runoff from the adjacent land and small streams, or by groundwater that seeps through the soil to the lowest point which is the lake.
    Hence, option (2) is the most appropriate.
  • Question 3
    1 / -0
    Which of following statements regarding rain is incorrect?
    Solution
    Rain is an important part of the water cycle and is a major form of precipitation by which the water vapour from the atmosphere reache the earth. It irrigates the fields directly as it falls on the crops. It causes the water table to rise as the rainwater percolates down through the layers of the soil.
    Rain is a pure form of water as it is formed by condensation of water vapour. In fact, it is a natural process by which water is desalinated. However, at places where air is highly polluted, gases like sulphur dioxide and oxides of nitrogen dissolve in the rainwater and come down as acid rain.
    Hence, the statement in option (3) is incorrect.
  • Question 4
    1 / -0
    Which of the following will not help in conservation of water?
    Solution
    Trees play an important role in the continuity of the water cycle as they release excess water into the atmosphere by transpiration. Moreover roots of the plants help to bind the soil and prevent its erosion. Thus they help to control the floods and land slides.Therefore, option (3) is incorrect.All the other mentioned methods will help in the conservation of water.
  • Question 5
    1 / -0
    Which of the following processes is not responsible for increasing the water vapour content in the atmosphere?
    Solution
    Water enters the atmosphere as it evaporates from the water bodies and is released from the plants by transpiration. Even exhaled air contains water vapour.
    However, condensation is the change of water vapour into liquid water on cooling. This process is reverse of vapourisation and due to this process water vapour content in the atmosphere decreases.
    Hence, option (3) is the correct answer.
  • Question 6
    1 / -0
    Rainwater falls on the earth and percolates through the layers of soil to add to the ground water. This process is called
    Solution
    The rainwater recharges the groundwater by seeping through the layers of soil. The process of seeping or percolation of the rainwater into the ground is called infiltration.
  • Question 7
    1 / -0
    Fog appearing on a cold winter morning is due to the process of _____________.
    Solution
    Condensation is the changing of water vapour into liquid water on cooling. On a cool winter morning, water vapour in the air condenses into tiny droplets of water which remain suspended in the atmosphere at or near the earth's surface. This thick cloud is known as fog.
    Hence, option (2) is correct.
    Evaporation is the changing of water into water vapour on heating.
    Transpiration is the loss of water in the form of water vapour by the plants.
    Precipitation is the falling of water in the form of rain, snow or hail.
  • Question 8
    1 / -0
    Water evaporated from oceans or seas _____________ and returns to the earth again to flow as rivers to meet the seas or directly fills up the seas and oceans.
    Solution
    The water vapour formed due to evaporation, cool in the upper layers of the atmosphere and condense on the nuclei of dust and smoke particles. The condensed water vapour collect to form clouds and come down as precipitation in the form of rain or snow. This continuous cycling of the water vapour between the earth and the atmosphere is called water cycle.
    Hence, option (1) is correct.
  • Question 9
    1 / -0
    Which of the following activities is not responsible for the depletion of the water table?
    Solution
    Infiltration is the process by which water on the ground surface percolates through the layers of soil and collects as ground water. This process recharges the water table rather than deplete it.
  • Question 10
    1 / -0
    The water vapour in the air condense to form tiny droplets of water which come together and fall back on the earth as rain, hail or snow. This is known as ___________.
    Solution
    The water vapour in the air condense to form tiny droplets of water which come together and fall as rain, hail or snow. This is known as precipitation.
  • Question 11
    1 / -0
    _______ occur if it does not rain for a long period in a region.
    Solution
    Drought is a condition of severe scarcity of water which occurs if it does not rain for a long period of time in the region.
    Hence, option (2) is correct.
    Floods are caused by excessive rainfall when large areas of land are submerged under water.
    Tsunami is a giant wave of sea water formed due to an earthquake or volcanic eruption on the sea or ocean bed.
    Cyclones are fast-moving violent and destructive windstorms.
  • Question 12
    1 / -0
    Directions: Answer the question considering the statement given below:

    Our Earth is covered by two-thirds of water, but most of the water is not potable.

    Why is there a scarcity of potable water?
    Solution
    All terrestrial life forms, including humans require fresh water for their needs. However, two-thirds of the earth's water that is present in the seas and oceans has a high salt content which makes it unusable and unfit for human consumption.
  • Question 13
    1 / -0
    Due to lack of rains, the wells, lakes and ponds get dried up, thereby creating a water scarcity as well as a risk of droughts. What happens to the soil in such near drought conditions?
    Solution
    Lack of rains or scanty rainfall, creates a water shortage. The soil loses its water by evaporation and becomes dry and patchy. If such conditions continue over a long period of time, it may lead to drought and the soil in such circumstances may develop large cracks.
  • Question 14
    1 / -0
    Which of the following helps water to percolate through the layers of soil into the ground?
    Solution
    Water cannot percolate through ceramic tiles, marble tiles or cemented floor.Standing water in a lawn can infiltrate through the layers of soil to recharge the ground water.Hence, option (2) is correct.
  • Question 15
    1 / -0
    Water is an important resource, and conservation of water is essential to avoid a condition of water shortage.
    One of the important ways of conserving water is by collecting rainwater in tanks for later use. What is this practice commonly referred to as?
    Solution
    'Rainwater harvesting' means collecting rainwater in tanks, etc. through pipes on the roof of houses and storing it for later use. It is an essential step in water conservation.
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