4th Class General Knowledge Our Environment Question Bank

done Environment and its Conservation Total Questions - 25

• question_answer1)
  Rohan is suffering from jaundice. What could be the possible reason for this?
  A)
   He played in polluted soil. done clear
  B)
   He drank polluted water. done clear
  C)
   He breathed polluted air. done clear
  D)
   All of these done clear
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• question_answer2)
  Runoff water from nearby crop fields enters a small lake. How will it affect the lake?
  A)
   It will cause the lake to dry up. done clear
  B)
   It will cause algae to grow in the lake. done clear
  C)
   It will cause the lake to become deeper. done clear
  D)
   It will cause water in the lake to become solid. done clear
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• question_answer3)
  By which of the following ways can we reuse water?
  A)
   Use water that is drained out from the washing machine to wash the vegetables. done clear
  B)
   Use water collected from rain to cook. done clear
  C)
   Collect water from leaking taps to water plants. done clear
  D)
   Both (a) and (b) done clear
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• question_answer4)
  Suhani set up the experiment as shown in the given figure. She heated 800 mL of water in flask P until it is completely evaporated. The amount of water collected in flask Q will be about ___.
  A)
   400 mL                       done clear
  B)
   750 mL           done clear
  C)
          800 mL           done clear
  D)
          700 mL                       done clear
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• question_answer5)
  Which of the things listed below are non-biodegradable?

  (i) Paper	(ii) Plastic toys
  (iii) Gold necklace	(iv) Roasted apple
  (v) Credit card	(vi) Ceramic bowls

  A)
   (i) and (ii) done clear
  B)
   (iii), (iv) and (v) done clear
  C)
   (ii), (iii), (v) and (vi) done clear
  D)
   (i), (iv) and (vi) done clear
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• question_answer6)
  Select the INCORRECT match from the following.                
  A)

  Causes of soil erosion	Methods of soil conservation
  Running water Carries the topsoil with it	Embankments

  done clear
  B)

  Causes of soil erosion	Methods of soil conservation
  Strong winds blow away humus-rich topsoil	Wind breaks

  done clear
  C)
        

  Causes of soil erosion	Methods of soil conservation
  Indiscriminate felling of trees	Afforestation

  done clear
  D)
   None of these done clear
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• question_answer7)
  Which of the following will cause water pollution?
  A)
   Using excessive fertilizers in the field. done clear
  B)
   Using recycled waste water for cleaning. done clear
  C)
   Putting unwanted waste in abandoned field. done clear
  D)
   Both (a) and (c) done clear
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• question_answer8)
  Read the following statements.

  1. I am present in air.

  2. Plants need me from the air for making food.

  3. I am released in the air when you breathe out.

  These statements are regarding ___.
  A)
   Carbon dioxide           done clear
  B)
   Nitrogen          done clear
  C)
          Hydrogen        done clear
  D)
          Oxygen done clear
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• question_answer9)
  In a village, farmers use chemical fertilizers in their fields. A considerable increase in soil pollution was noticed as the farming activity intensified. What could be the most likely reason for this ?
  A)
   Chemicals used to destroy weed and pest are polluting the field. done clear
  B)
   Living organisms used in fertilizers are polluting the land. done clear
  C)
   Smoke particles from the industry got settled in moist surroundings of the field. done clear
  D)
   Both (a) and (c) done clear
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• question_answer10)
  Which of the following is a cause of acid rain?
  A)
   Volcanic eruption       done clear
  B)
   Burning of fossil fuels done clear
  C)
   Releasing of smoke from factories done clear
  D)
   All of these done clear
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• question_answer11)
  Select the INCORRECT statement about global warming.

  (i) The average temperature of the Earth's surface is gradually decreasing.

  (ii) Carbon dioxide, methane and nitrous oxide are responsible for global warming,

  (iii) The average temperature of the sun's surface is gradually increasing.

  A)
   (i) only                        done clear
  B)
   (i) and (iii) only           done clear
  C)
   (ii) only           done clear
  D)
          (ii) and (iii) only done clear
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• question_answer12)
  Ramit classified few things under two different categories as follows:

  X	Y
  Plants	Soil
  Microbes	Water
  Animals	Air

  Identify X and Y in the above classification.
  A)

  X	Y
  Biodegradable	Non-biodegradable

                  done clear
  B)

  X	Y
  Biotic	Abiotic

  done clear
  C)
          

  X	Y
  Non-biodegradable	Biodegradable

                  done clear
  D)

  X	Y
  Abiotic	Biotic

  done clear
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• question_answer13)
  The diagram below shows steps of the water cycle. If O is the first step in the cycle, arrange the rest of the steps in the correct order of a water cycle.
  A)
   O, N, P, M      done clear
  B)
          O, M, N, P      done clear
  C)
          O, N, M, P      done clear
  D)
          O, P, N, M      done clear
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• question_answer14)
  The Earth's atmosphere is made up of various gases. Which of the following best describes this composition of gases?
  A)
   Oxygen - 78%, Nitrogen - 21%, Others - 1% done clear
  B)
   Oxygen - 60%, Nitrogen - 30%, Others - 10% done clear
  C)
   Nitrogen - 78%, Oxygen - 21%, Others - 1% done clear
  D)
   Nitrogen - 78%, Oxygen - 21%, Carbon dioxide - 1% done clear
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• question_answer15)
  Study the given table showing the bacterial count, oxygen level, and the number of green plants and animals in the river near each of four towns P, Q, R and S. Which town is situated near an unpolluted river?
  A)
   P done clear
  B)
   Q done clear
  C)
   R done clear
  D)
   S done clear
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• question_answer16)
  Which of the following is the best method of obtaining salt from salted water?
  A)
       done clear
  B)
    done clear
  C)
     done clear
  D)
            None of these done clear
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• question_answer17)
  Mohit continued to heat 100 mL of pure water for 20 minutes after it reached boiling point. Which of the following figures shows the result at the end of the experiment?
  A)
       done clear
  B)
    done clear
  C)
            done clear
  D)
             done clear
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• question_answer18)
  Which of the following statements is INCORRECT?
  A)
   Non-biodegradable household wastes can decrease soil fertility. done clear
  B)
   Planting of trees can help in preventing soil erosion. done clear
  C)
   Terrace farming helps in preventing landslides. done clear
  D)
   Cutting down of trees in large numbers is called afforestation. done clear
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• question_answer19)
  Match column I with column II and select the correct option from the given codes.

  Column I	Column II
  (A) Air pollution (B) Water pollution (C) Soil pollution	1. Asthma 2. Dysentery 3. Barren land 4. Acid rain

  A)
   (a)-1, (b)-2, 4; (c)-3 done clear
  B)
   (a)-1, 2; (b)-4; (c)-3 done clear
  C)
   (a)-1, 4; (b)-2; (c)-3 done clear
  D)
   (a)-4, (b)-1, 2; (c)-3 done clear
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• question_answer20)
  The given picture shows terrace farming. It helps in ___.
  A)
   Preventing landslides done clear
  B)
   Reducing soil erosion by water done clear
  C)
   Reducing soil erosion by deforestation done clear
  D)
   Both (a) and (b) done clear
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• question_answer21)
  Which one of the following is a useful biological indicator of sulphur dioxide pollution?
  A)
   Algal blooms done clear
  B)
   Lichens done clear
  C)
   Bryophytes done clear
  D)
   None of these done clear
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• question_answer22)
  How can toxic chemicals in the soil harm you?
  A)
   They change the weather. done clear
  B)
   They are absorbed by food grown in the soil. done clear
  C)
   They purify ground water in the soil. done clear
  D)
   They cause more air pollution. done clear
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• question_answer23)
  Which country has the highest air pollution level among all European Union countries?
  A)
   Germany done clear
  B)
   France done clear
  C)
   Greece done clear
  D)
   Poland done clear
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• question_answer24)
  Study the given diagram. What can the bus-driver do to reduce the pollution caused by his bus?
  A)
   Send the bus for servicing more regularly done clear
  B)
   Tie a plastic bag around the exhaust pipe done clear
  C)
   Use a bigger exhaust pipe done clear
  D)
   Put a silencer at the exhaust pipe done clear
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• question_answer25)
  Who said the below given statement? "Earth provides enough to satisfy every man's need, but not every man's greed".
  A)
   Jawaharlal Nehru done clear
  B)
   Subash Chandra Bose done clear
  C)
   Mahatma Gandhi done clear
  D)
   None of these done clear
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