9th Class Science Natural resources Question Bank

done Natural Resources Total Questions - 20

• question_answer1)
  Select the incorrect statement regarding the rainfall with low pH.
  A)
  It affects aquatic life and corrodes metal, stone, etc. done clear
  B)
  It is caused by reaction of sulphur and nitrogen oxides with moisture in air. done clear
  C)
  It is the consequence of increased use of non-conventional sources of energy. done clear
  D)
  It affects plants also. done clear
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• question_answer2)
  The phenomenon of increase in concentration of non-biodegradable organic compounds with each trophic level in a food chain is called
  A)
  Biological evolution done clear
  B)
  Bioenlargement done clear
  C)
  Biological fixation done clear
  D)
  Biomagnification. done clear
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• question_answer3)
  Which of the following is not an effect of deforestation?
  A)
  Biodiversity loss done clear
  B)
  Global warming done clear
  C)
  Soil erosion done clear
  D)
  None of these done clear
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• question_answer4)

  Some water falling on ground, forms an extremely thin, tightly held film around the soil particles called _____ while some water moves down upto the water table and is called _____.

  Select the option that correctly fills the blanks in the above statement.

   
  A)
  Gravitational water, capillary water done clear
  B)
  Hygroscopic water, surface runoff done clear
  C)
  Hygroscopic water, gravitational water done clear
  D)
  Capillary water, surface runoff done clear
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• question_answer5)
  Select the option that correctly identifies X and Y in the given flow chart.            
  A)
         

  X	Y
  Ecological	BHC

                  done clear
  B)

  X	Y
  Biological	Fertiliser

                  done clear
  C)

  X	Y
  Biological	Heat

                  done clear
  D)

  X	Y
  Ecological	Bacteria

  done clear
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• question_answer6)

  Read the given paragraph.

  Soil X has very poor water holding capacity, soil Vis well drained and contains one part clay and two parts each of sand and silt. Soil Z has excellent water holding capacity but is poorly aerated.

  Select the correct statement regarding soils X, Y and Z.
  A)
  Soil X is commonly found in those regions where xerophytes are abundant. done clear
  B)
  Soil Z is best suited for growth of plants like Casuarina, Eucalyptus and watermelon. done clear
  C)
  Soil Y is best suited for making pots. done clear
  D)
  All of these done clear
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• question_answer7)
  Which of the following activities will not lead to both air and water pollution?
  A)
  Burning of fossil fuels done clear
  B)
  Use of CFCs done clear
  C)
  Use of pesticides in crop fields done clear
  D)
  Setting up of a chemical factory near water body done clear
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• question_answer8)
  Read the given statements and select the correct option.

  Statement 1: Extensive use of fossil fuels possess dual problem it increases air pollution and depletes fuel resources.

  Statement 2: Fossil fuels release oxides of nitrogen and sulphur on burning which consequently cause acid rain and smog.

  A)
  Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done clear
  B)
  Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done clear
  C)
  Statement 1 is true and statement 2 is false. done clear
  D)
  Both statements 1 and 2 are false. done clear
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• question_answer9)
  The given graph shows the amount of pollutants in four rivers P, Q, R and S. The river that can continue to support the most number of aquatic plants and animals is _____.
  A)
  P                                  done clear
  B)
  Q                     done clear
  C)
         R                      done clear
  D)
         S done clear
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• question_answer10)
  The given figure represents the oxygen cycle which maintains the level of oxygen in the atmosphere. Which of the following processes will you place at X and Y in the figure?
  A)

  X	Y
  Combustion	Respiration

                  done clear
  B)

  X	Y
  Respiration	Transpiration

  done clear
  C)

  X	Y
  Photosynthesis	Evaporation

                  done clear
  D)

  X	Y
  Photosynthesis	Respiration

              done clear
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• question_answer11)
  Eutrophication is the process in which dissolved oxygen in water is reduced due to excessive growth of algae. This is the result of
  A)
  Change in temperature of water done clear
  B)
  Extra loading of nutrients in water body done clear
  C)
  Stratification of aquatic habitat done clear
  D)
  Bioaccumulation in algae. done clear
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• question_answer12)
  Match column I with column II and select the correct option from the given codes.

  Column I	Column II
  (a) Particulate matter	(i) Chemical water pollutant
  (b) Heat	(ii) Non-degradable soil pollutant
  (c) Detergent	(iii) Degradable
  (d) Plastic	(iv) Air pollutant
  (e) Vegetable peel	(v) Physical water pollutant

  A)
  (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii), (e)-(v) done clear
  B)
  (a)-(iv), (b)-(v), (c)-(i), (d)-(ii), (e)-(iii) done clear
  C)
  (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv), (e)-(v) done clear
  D)
  (a)-(i), (b)-(ii), (c)-(iii), (d)-(v), (e)-(iv) done clear
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• question_answer13)
  Soil is a complex mixture. The given figure shows the percentage by volume of different soil components as P, 0, R and S. What will you place at S?
  A)
  Air done clear
  B)
  Water done clear
  C)
  Organic matter done clear
  D)
  Either air or water done clear
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• question_answer14)
  Which of the following statements is incorrect regarding nitrogen fixation?
  A)
  Nitrosomonas converts ammonia into nitrites. done clear
  B)
  Nitrobacter converts nitrites into nitrates. done clear
  C)
  Both (a) and (b) can be called nitrification. done clear
  D)
  Nitrosomonas and Nitrobacter are usually photoautotrophs. done clear
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• question_answer15)
  Organisms like lichens are very sensitive to the levels of
  A)
  Carbon dioxide done clear
  B)
  Sulphur dioxide done clear
  C)
  Carbon monoxide done clear
  D)
  Methane. done clear
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• question_answer16)
  The given figure shows a river and the types of land use on the sides of the river. The water quality of the river was studied by measuring the amounts of dissolved oxygen and ammonia in the water collected at sites X, Y and Z. The results are given below:

  Site	Dissolved oxygen \[\text{(c}{{\text{m}}^{\text{3}}}\text{/litre)}\]	Ammonia (ppm)
  X	8.9	0.02
  Y	0.3	0.62
  Z	1.6	5.30

   

  Which of the following is correct regarding this?

   
  A)
  Site X has the highest content of dissolved oxygen because of eutrophication. done clear
  B)
  Site Z has the highest concentration of ammonia because of leaching of fertilisers from the nearby crop fields. done clear
  C)
  Organisms such as algae and weeds will thrive at site Y, while very few fishes are found at site Y. done clear
  D)
  Both (b) and (c). done clear
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• question_answer17)
  The given graph shows changes in concentration of two substances X and Y in a river polluted by sewage. Which of the following options most appropriately identifies X and Y?
  A)
  X-Carbon dioxide, Y-Nitrogen compounds done clear
  B)
  X-Nitrogen compounds; Y-Carbon dioxide done clear
  C)
  X-Nitrogen compounds; Y-Oxygen done clear
  D)
  X-Oxygen; Y-Nitrogen compounds done clear
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• question_answer18)
  The given cycle represents circulation of nitrogen in the environment. Identify X, Y and Z in the cycle and select the correct option.
  A)
  X-Denitrification, Y-Ammonification, Z - Nitrogen fixation done clear
  B)
  X - Nitrate, Y - Denitrification, Z - Ammonification done clear
  C)
  X - Nitrate,   Y - Nitrogen fixation, Z - Ammonification done clear
  D)
  X-Nitrification, Y-Ammonification, Z - Denitrification done clear
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• question_answer19)

  R is an organic compound containing only carbon, chlorine and fluorine. It has been widely used as refrigerant, propellent and solvent. Montreal protocol phased out manufacture of such compounds because, R contributes to S in the atmosphere.

  Which of the following would not be a consequence of S?

  A)
  Increased incidences of severe sunburns done clear
  B)
  Increased incidences of cataracts done clear
  C)
  Increased incidences of premature skin ageing done clear
  D)
  Increased incidences of diabetes done clear
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• question_answer20)
  The following table shows mercury concentration in various organisms living in the same terrestrial habitat.

  Organism	Mercury concentration (parts per trillion)
  P	3,000
  Q	6,90,000
  R	8,900
  S	2,800,000
  T	16,000

  Now, select the correct food chain interlinking these organisms that will exist in the ecosystem
  A)
  \[\text{T}\to \text{Q}\to \text{P}\to \text{R}\to \text{S}\] done clear
  B)
  \[\text{P}\to \text{Q}\to \text{R}\to \text{S}\to \text{T}\] done clear
  C)
  \[\text{P}\to \text{R}\to \text{T}\to \text{Q}\to \text{S}\] done clear
  D)
  \[\text{T}\to \text{R}\to \text{S}\to \text{P}\to \text{Q}\] done clear
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