7th Class Science Weather, Climate and Adaptation of Animals to Climate Question Bank

done Our Environment Total Questions - 40

• question_answer1)
  Rigid outer part of earth consisting of crust and upper mantle is:
  A)
  Exosphere                      done clear
  B)
  Lithosphere done clear
  C)
  Hydrosphere       done clear
  D)
         Atmosphere done clear
  E)
  None of these done clear
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• question_answer2)
  Which one of the following statements is incorrect?
  A)
  Decomposers supply nutrients to the growing plants in the forest. done clear
  B)
  Decomposers help in the accumulation of dead bodies of plants and animals in forests. done clear
  C)
  Decomposers help in formation of manure. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer3)
  Which of the following is a liquid waste?
  A)
  Sludge               done clear
  B)
  Sewage done clear
  C)
  Rags                  done clear
  D)
         All the above done clear
  E)
  None of these done clear
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• question_answer4)
  In waste water treatment useful products obtained are:
  A)
  Biogas               done clear
  B)
  Sludge done clear
  C)
  Aerobic bacteria done clear
  D)
         Both [a] and [b] done clear
  E)
  None of these done clear
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• question_answer5)
  Decomposers are also known as :
  A)
  Autotrophs                     done clear
  B)
  Herbivores done clear
  C)
  Saprotrophs done clear
  D)
         Canopy done clear
  E)
  None of these done clear
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• question_answer6)
  Starting from the top to bottom which one of the following sequence of layers of forest is correct?
  A)
  Understorey, Shrub layer, Forest floor, Herb layer, Canopy done clear
  B)
  Canopy, Understorey, Shrub layer, Herb layer, Forest floor done clear
  C)
  Canopy, Understorey, Herb layer, Shrub layer. Forest floor done clear
  D)
  Shrub layer, Herb layer, Forest floor, Understorey, Canopy done clear
  E)
  None of these done clear
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• question_answer7)
  Which of the following helps in maintaining the supply of nutrients to the plants?
  A)
  Frog                              done clear
  B)
  Grasshopper done clear
  C)
  Fungi     done clear
  D)
         Mosquito done clear
  E)
  None of these done clear
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• question_answer8)
  A ____ has a very strong stem.
  A)
  Bush                             done clear
  B)
  Tree done clear
  C)
  Creeper  done clear
  D)
         Climber done clear
  E)
  None of these done clear
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• question_answer9)
  Branchy part of a tree above the stem is known as:
  A)
  Shrub                done clear
  B)
  Herb done clear
  C)
  Crown   done clear
  D)
         Floor done clear
  E)
  None of these done clear
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• question_answer10)
  Herbs form the ____ layer of vegetation in the forest.
  A)
  Lowest done clear
  B)
  Highest done clear
  C)
  Middle   done clear
  D)
         All the above done clear
  E)
  None of these done clear
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• question_answer11)
  A major component of soil, dark brown in colour and consists of decaying remains of plants and animals.
  A)
  Mineral particles  done clear
  B)
  Silt done clear
  C)
  Humus  done clear
  D)
         Sand done clear
  E)
  None of these done clear
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• question_answer12)
  Which of the following is not responsible for destruction of forests?
  A)
  Deforestation                  done clear
  B)
  Afforestation done clear
  C)
  Fire                   done clear
  D)
         Overgrazing done clear
  E)
  None of these done clear
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• question_answer13)
  The forests which are commonly known as orchard of the world?.
  A)
  Temperate deciduous forests. done clear
  B)
  Temperate evergreen forests. done clear
  C)
  Mediterranean forests. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer14)
  Which of the following is not a process of cleaning water?
  A)
  Filtration                        done clear
  B)
  Decantation done clear
  C)
  Infiltration          done clear
  D)
         Chlorination done clear
  E)
  None of these done clear
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• question_answer15)
  Which of the following functions is not performed by earthworms in the soil?
  A)
  Loosening the soil.          done clear
  B)
  Improving the soil quality. done clear
  C)
  Irrigating the soil. done clear
  D)
  Enriching the soil by nutrients. done clear
  E)
  None of these done clear
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• question_answer16)
  World water day is celeberated on:
  A)
  22 June             done clear
  B)
  22 March done clear
  C)
  22 Dec  done clear
  D)
         5 June done clear
  E)
  None of these done clear
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• question_answer17)
  Which one of the following is an organic impurity present in sewage?
  A)
  Nitrates              done clear
  B)
  Metals done clear
  C)
  Urea                  done clear
  D)
         Phosphates done clear
  E)
  None of these done clear
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• question_answer18)
  Provision of drainage at a place by laying sewers under the ground is:
  A)
  Sewage              done clear
  B)
  Contaminants done clear
  C)
  Sewerage           done clear
  D)
         Decomposition done clear
  E)
  None of these done clear
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• question_answer19)
  Which of the following characteristics belongs to the B-Horizon?

  (i) It is also known as sub-soil.

  (ii) It has very little humus.

  (iii) It consists of bed rocks.

  (iv) It is rich in soluble minerals.

  A)
  (i) and (ii)                       done clear
  B)
  (i), (ii) and (iv) done clear
  C)
  (ii), (iii) and (iv)   done clear
  D)
  (i), (iii) and (iv) done clear
  E)
  None of these done clear
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• question_answer20)
  Portable toilets are ____ toilets.
  A)
  Septic tank                     done clear
  B)
  Composting done clear
  C)
  Chemical           done clear
  D)
         Vermi-processing done clear
  E)
  None of these done clear
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• question_answer21)
  Highest layer of vegetation in a forest:
  A)
  Understorey                    done clear
  B)
  Canopy done clear
  C)
  Herb layer          done clear
  D)
         Shrub layer done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer22)
  Which of the following is prepared from the wood obtained from forest?
  A)
  Paper done clear
  B)
                     Matchsticks done clear
  C)
  Plywood            done clear
  D)
         All the above done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer23)
  Which of the following is not required for the weathering of rocks?
  A)
  Wind                 done clear
  B)
  Sun's heat done clear
  C)
  Ploughing           done clear
  D)
         Rain done clear
  E)
  None of these done clear
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• question_answer24)
  In digester tank which one of the following is present?
  A)
  Aerobic bacteria  done clear
  B)
  Anaerobic bacteria done clear
  C)
  Red worms                     done clear
  D)
  Both [a] and [b] done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer25)
  Soil containing smallest rock particles is:
  A)
  Silt                                done clear
  B)
  Sand done clear
  C)
  Gravel   done clear
  D)
         Clay done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer26)
  Match the following:

  Column A		Column B
  (i)	A- horizon	[A]	Subsoil
  (ii)	B- horizon	[B]	Hard rock
  (iii)	C- horizon	[C]	Substratum
  (iv)	D- horizon	[D]	Rich humus

  A)
  (i-D), (ii-B), (iii-A), (iv-C) done clear
  B)
  (i-D), (ii-A), (iii-C), (iv-B) done clear
  C)
  (i-D), (ii-B), (iii-C), (iv-A) done clear
  D)
  (i-B), (ii-D), (iii-A), (iv-C) done clear
  E)
  None of these done clear
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• question_answer27)
  It is difficult to dig deeper into the soil because:
  A)
  Plants are there. done clear
  B)
  Microorganisms are present there. done clear
  C)
  Partially weathered rocks or bed rock are present there. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer28)
  Which of the following statements is correct?

  (i) Loamy soil contains sufficient amount of humus.

  (ii) Clayey soil contains good quantity of sand and silt.

  (iii) Sandy soil cannot hold much water in it.

  (iv) Size of Clay particles is bigger than those of silt particles.

  A)
  (i) and (ii)                       done clear
  B)
  (i) and (iii) done clear
  C)
  (ii) and (iii)         done clear
  D)
         (iii) and (iv) done clear
  E)
  None of these done clear
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• question_answer29)
  Plants mainly absorb water and minerals from:
  A)
  R - horizon                     done clear
  B)
  A - horizon done clear
  C)
  B - horizon         done clear
  D)
         C - horizon done clear
  E)
  None of these done clear
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• question_answer30)
  Unweathered solid rocks are present in:
  A)
  B - horizon                     done clear
  B)
  A - horizon done clear
  C)
  R - horizon done clear
  D)
         C - horizon done clear
  E)
  None of these done clear
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• question_answer31)
  Reyansh wants to prepare some toys and statues by using soil. Which type of soil he should use for this purpose?
  A)
  Sandy soil                      done clear
  B)
  Siltysoil done clear
  C)
  Gravel soil         done clear
  D)
         Clayey soil done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer32)
  Minimum percolation of water is seen in:
  A)
  Loamy soil                     done clear
  B)
  Clayey soil done clear
  C)
  Sandy soil          done clear
  D)
         Silt soil done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer33)
  ___ is the uppermost fertile layer of earth crust.
  A)
  Mineral              done clear
  B)
  Metal done clear
  C)
  Bed rock            done clear
  D)
         Topsoil done clear
  E)
  None of these done clear
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• question_answer34)
  Highest water holding capacity is of:
  A)
  Sandy soil                      done clear
  B)
  Loamy soil done clear
  C)
  Clayey soil         done clear
  D)
         Gravel soil done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer35)
  Which of the following contains largest sized rock particles?
  A)
  Silt                                done clear
  B)
  Gravel done clear
  C)
  Clay                  done clear
  D)
         Sand done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer36)
  The soil which is obtained from basaltic rock is:
  A)
  Desert soil                      done clear
  B)
  Red soil done clear
  C)
  Alluvial soil        done clear
  D)
         Black soil done clear
  E)
  None of these done clear
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• question_answer37)
  Which soil is also known as ?Khadar??
  A)
  Red soil             done clear
  B)
  Black soil done clear
  C)
  Alluvial soil done clear
  D)
         Desert soil done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer38)
  Which of the following is mostly used for road construction?
  A)
  Clay                              done clear
  B)
  Gravel done clear
  C)
  Silt                    done clear
  D)
         Loam done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer39)
  Choose the correct order for the particle sizes of different types of soil.
  A)
  Sand > gravel > silt > clay done clear
  B)
  Clay > gravel > sand > silt done clear
  C)
  Gravel > clay > sand > silt done clear
  D)
  Gravel > sand > silt > clay done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer40)
  Name the term used for accumulation of wastes in the soil generated by human activity that alter the features of soil.
  A)
  Percolation                     done clear
  B)
  Soil erosion done clear
  C)
  Soil pollution      done clear
  D)
         Soil precaution done clear
  E)
  None of these done clear
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