7th Class Science Forests: Our Lifeline Question Bank

done Resources on Earth - Forests and Ecosystem Total Questions - 40

• question_answer1)
  Study the food chain given below.

  \[M\to N\to O\to P\to Q\]

  What will be the immediate impact if the population of 'P' is wiped out due to an illness?
  A)
   M, N, O and Q will also die. done clear
  B)
   The population of Q will decrease. done clear
  C)
   The population of Q will decrease. done clear
  D)
   The population of Q will increase. done clear
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• question_answer2)
  What is a long-term effect of clearing of larger areas of rain forest?
  A)
   Decreased carbon dioxide content in the air. done clear
  B)
   Decreased flooding of low-lying land. done clear
  C)
   Increased rainfall in these areas. done clear
  D)
   Increased rate of soil erosion. done clear
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• question_answer3)
  Which of the following statements is incorrect?
  A)
   Some bacteria and fungi absorb nutrients from dead plants and animals. done clear
  B)
   Snails, millipedes, termites and woodlice are decomposers. done clear
  C)
   Decomposers break down dead matter and wastes into minerals. done clear
  D)
   Mould can cause food to decay. done clear
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• question_answer4)
  Which of the following is NOT a consequence of deforestation?
  A)
   Increased levels of ground water. done clear
  B)
   Removal of the top layer of soil by wind. done clear
  C)
   Increased levels of carbon dioxide in the atmosphere. done clear
  D)
   Destruction of the natural habitats of plants and animals. done clear
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• question_answer5)
  What is the name of the process 'X' in the figure?
  A)
   Respiration                        done clear
  B)
   Breathing           done clear
  C)
   Feeding               done clear
  D)
          Photosynthesis done clear
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• question_answer6)
  Which statement describes a food web?
  A)
   It is made up of an extra-long food chain. done clear
  B)
   It is a food chain with goat as a consumer. done clear
  C)
   It is a food chain with man as the final consumer. done clear
  D)
   It is made up of many inter- connecting food chains. done clear
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• question_answer7)
  Which of the following gases is increased in air in the absence of forests?
  A)
   Oxygen               done clear
  B)
   Nitrogen             done clear
  C)
          Carbon dioxide   done clear
  D)
          Hydrogen done clear
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• question_answer8)
  B Study the given diagram Which of the following components is exchanged by plants and animals for their life processes to take place?
  A)
   Space                                   done clear
  B)
   Gases   done clear
  C)
   Water                  done clear
  D)
          Nutrients done clear
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• question_answer9)
  P Which of the following organisms are called decomposers?

  (i) Ants

  (ii) Bacteria

  (ii) Fungi

  (iv) Worms

  A)
   (i) and (ii) only done clear
  B)
   (ii) and (iii) only done clear
  C)
   (i), (ii) and (iii) only done clear
  D)
   (ii), (iii) and (iv) only done clear
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• question_answer10)
  Which of the following groups consists of a decomposer, a producer and a predator respectively?
  A)
   Grass, goat and eagle. done clear
  B)
   Mould, sugarcane and lizard. done clear
  C)
   Papaya plant, caterpillar and bird. done clear
  D)
  Toad stool, rotting log and earth-worm. done clear
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• question_answer11)
  Observe the given diagram of tree Which of these statements best explains the shape of the given tree?
  A)
   Trees that have very thick trunk have such crowns. done clear
  B)
   The branches spread out so that they receive enough sunlight and can be home to many animals. done clear
  C)
   The leaves are spread out not to receive as much sunlight as possible. done clear
  D)
   The branches spread the leaves so as to protect trees from predators. done clear
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• question_answer12)
  Which of the following trees would be most suitable for growing along a walkway?
  A)
   A and C                                done clear
  B)
   A and B                done clear
  C)
          B and C                done clear
  D)
          A and D done clear
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• question_answer13)
  Which of the following are the two components of an ecosystem?
  A)
   Plants and animals only done clear
  B)
   Trees and fungi only done clear
  C)
   Living and nonliving done clear
  D)
   Frogs and man only done clear
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• question_answer14)
  When we destroy a forest which of the following is destroyed?
  A)
   An ecosystem. done clear
  B)
   The plant life only. done clear
  C)
   Population of wild life only. done clear
  D)
   Food and shelter of wild animals only. done clear
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• question_answer15)
  What does the diagram given below represent?
  A)
   The life cycle of grass. done clear
  B)
   A population. done clear
  C)
   Animals living in a habitat. done clear
  D)
   A food chain. done clear
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• question_answer16)
  Which of the following plays an important role in causing rainfall?
  A)
   Animals                               done clear
  B)
   Plants   done clear
  C)
   Factories             done clear
  D)
          Vehicles done clear
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• question_answer17)
  Which of the following should come in the empty box in the food chain given below?
  A)
                                                  done clear
  B)
                         done clear
  C)
                                                          done clear
  D)
         done clear
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• question_answer18)
  Which of the following might happen if plants stop releasing oxygen into the atmosphere?
  A)
   Plants will be more healthier done clear
  B)
   Number of plants will increase done clear
  C)
   Number of animals will increase done clear
  D)
   Living organisms will die due to the lack of oxygen done clear
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• question_answer19)
  In nature there is an interdependence between plants and animals for food, oxygen and carbon dioxide. Which of the following conclusions is true about the given statement?
  A)
   Some day all the oxygen will be used up by the animals. done clear
  B)
   Some day all the carbon dioxide will be used up by the plants. done clear
  C)
   The amount of oxygen is increasing and that of carbon dioxide is decreasing in our atmosphere. done clear
  D)
   The level of oxygen and carbon dioxide in the atmosphere is kept constant. done clear
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• question_answer20)
  Which of the following is the use of forests to an environment?
  A)
   Forest prevent diseases. done clear
  B)
   Forest prevent rainfall. done clear
  C)
   Forest promote soil erosion. done clear
  D)
   Forest prevent floods. done clear
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• question_answer21)
  Which process in plants is responsible for the release of oxygen?
  A)
   Respiration        done clear
  B)
   Digestion            done clear
  C)
          Photosynthesis done clear
  D)
          Reproduction                   done clear
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• question_answer22)
  Which process is responsible for the release of carbon dioxide by animals?
  A)
   Respiration        done clear
  B)
   Digestion            done clear
  C)
          Photosynthesis   done clear
  D)
          Reproduction                   done clear
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• question_answer23)
  Which of the following converts the dead plants and animals into minerals?
  A)
   Chemicals                           done clear
  B)
   Scavengers        done clear
  C)
          Decomposers done clear
  D)
          Consumers                        done clear
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• question_answer24)
  In which of the following groups of animals vultures and jackals are included?
  A)
   Herbivores                         done clear
  B)
   Decomposers done clear
  C)
                          Scavengers        done clear
  D)
          Parasites done clear
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• question_answer25)
  What is the bird called in the given food chain?

  \[Grass\to Grasshoppers\to Birds\to Snakes\]

  A)
   Producer                            done clear
  B)
   Parasite               done clear
  C)
          Decomposer done clear
  D)
          Consumer done clear
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• question_answer26)
  Which of the following statements is NOT correct?
  A)
   Forests protects the soil from erosion. done clear
  B)
   Plants and animals in a forest are dependent on one another. done clear
  C)
   Forest do not influence the climate and water cycle. done clear
  D)
   Soil helps the forests to grow and regenerate. done clear
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• question_answer27)
  Water vapour is returned to the atmosphere through which of the following processes?

  (i) Respiration carried out by living organisms.

  (ii) Transpiration carried out by living organism

  (iii) The evaporation of water from ponds, lakes and seas.

  A)
    (i)only done clear
  B)
   (ii) and (iii) only             done clear
  C)
   (i) and (iii) only done clear
  D)
   (i), (ii) and (iii) done clear
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• question_answer28)
  A balanced and stable ecosystem is created through which of the following options?
  A)
   By the natural cycles only. done clear
  B)
   By the interactions between animals only. done clear
  C)
   By the interactions between organisms and the environment. done clear
  D)
   By the interactions between plants and animals only. done clear
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• question_answer29)
  Which of the following consequences is/ are due to uncontrolled deforestation?

  (i) The destruction of habitats

  (ii) Landslides

  (iii) Flooding

  A)
   (i) only         done clear
  B)
   (i) and (ii) only done clear
  C)
   (ii) and (iii) only done clear
  D)
   (i), (ii) and (iii) done clear
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• question_answer30)
  Which of the following must be practised to preserve and conserve the environment?
  A)
   Deforestation done clear
  B)
   Recycling and afforestation done clear
  C)
   Soil erosion done clear
  D)
   Increase in pollution done clear
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• question_answer31)
  Plants and animals maintain the balance of oxygen and carbon dioxide in the air. Which of the following processes represents X and Y?                
  A)

  X	Y
  Respiration	Transpiration

                  done clear
  B)

  X	Y
  Transpiration	Decay

                  done clear
  C)

  X	Y
  Photosynthesis	Respiration

                  done clear
  D)

  X	Y
  Decay	Photosynthesis

  done clear
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• question_answer32)
  In any food chain the largest population is that of which of the following organisms?
  A)
   Producers                          done clear
  B)
   Consumer          done clear
  C)
          Decomposers done clear
  D)
          Parasite done clear
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• question_answer33)
  Which of the following include all living organisms and all life supporting regions of the earth?
  A)
   Biosphere          done clear
  B)
          Ionosphere       done clear
  C)
          Stratosphere done clear
  D)
          Lithosphere                       done clear
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• question_answer34)
  Chipko movement is concerned with which of the following processes?
  A)
   Conservation of natural resources. done clear
  B)
   Plant/forest conservation. done clear
  C)
   Plant hybridization. done clear
  D)
   Environmental pollution. done clear
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• question_answer35)
  Which of the following processes is/are prevented by step farming?
  A)
   Soil erosion                        done clear
  B)
   Deforestation done clear
  C)
                          Afforestation done clear
  D)
          All of these done clear
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• question_answer36)
  Under which headings can flora and fauna be considered?
  A)
   Renewable and non-living resources. done clear
  B)
   Non-renewable and living resources. done clear
  C)
   Living resources. done clear
  D)
   Non-renewable and non-living resources. done clear
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• question_answer37)
  How does our government protect the rainforests of our country?

  (i) Prohibits the felling of trees.

  (ii) Tress that have been chopped down are replanted.

  (iii) Discourages the use of pesticides in agriculture

  A)
    (i) and (ii) only                 done clear
  B)
   (i) and (iii) only done clear
  C)
          (ii) and (iii) only done clear
  D)
   (i), (ii) and (iii)   done clear
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• question_answer38)
  Which of the following are called green lungs?
  A)
   Mountains                         done clear
  B)
   Oceans                done clear
  C)
          Forests                done clear
  D)
          Rivers done clear
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• question_answer39)
  Which statement is correct?
  A)
   Plants and animals in a forest do not depend on one another. done clear
  B)
   Forests has no influence on the climate and water cycle. done clear
  C)
   Forests protect the soil from erosion. done clear
  D)
   Soil has no influence on plants. done clear
  View Solution play_arrow

• question_answer40)
  The insects, butterflies, honeybees and birds help flowering plants in which of the following processes?
  A)
   Fertilization done clear
  B)
   Pollination done clear
  C)
   Cultivation done clear
  D)
   Conservation done clear
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