Olympiad – Class IX – Science - Bio - Natural resources

Buy Olympiad -IX Standard Practice test pack

Question - 1

Which of the following steps are used to treat industrial wastes and reduce pollution?
(i) The recycling and the reusing of the wastes
(ii) The discharging of the wastes into the sea
(iii) The treating and neutralising harmful chemicals in the wastes

  • A Only (i) and (iii)
  • B Only (i) and (ii)
  • C Only (ii) and (iii)
  • D (i), (ii) and (iii)

Question - 2

Which of the following would happen in the absence of greenhouse effect in the atmosphere?

  • A Pollution will increase.
  • B The earth's surface temperature will increase.
  • C The earth's surface temperature remains the same.
  • D The depleted ozone layer will decrease the earth's temperature

Question - 3

The diagram given below shows a part of the nitrogen cycle

Which of the labelled arrows indicates nitrogen fixation and denitrification?

  • A Nitrogen fixation Denitrification P Q
  • B Nitrogen fixation Denitrification R S
  • C Nitrogen fixation Denitrification Q P
  • D Nitrogen fixation Denitrification R Q

Question - 4

What is fare the likely consequences of deforestation?

  • A Carbon dioxide in the air increases.
  • B Destruction of habitats takes place.
  • C Mineral salts in the soil are washed away.
  • D All of the above

Question - 5

What kind of pollution is being caused if a factory releases waste products into a nearby stream?

  • A Air
  • B Noise
  • C Water
  • D Soil

Question - 6

Identify the given biogeo chemical cycle.

  • A Mineral cycle
  • B Nitrogen cycle
  • C Water cycle
  • D Oxygen cycle

Question - 7

which of these statements are true about air?
(i) Air is a mixture of several types of gases.
(ii) Air exerts pressure.
(iii) The composition of air is constant in the atmosphere.

  • A (i) and (ii)
  • B (ii) and (iii)
  • C (ii) and (iii)
  • D (i), (ii) and (iii)

Question - 8

What causes movement in air?

  • A Difference in temperature
  • B Difference in pressure
  • C Difference in volume
  • D Both (A) and (B)

Question - 9

Which of the following natural processes play(s) a role in the nitrogen cycle?
(i) lightning (ii) Flood (iii) Storm

  • A Lightning
  • B Flood
  • C Storm
  • D All of these

Question - 10

The water cycle in nature involves which of the following processes sequentially?

  • A Evaporation, precipitation and condensation.
  • B Precipitation, condensation and evaporation.
  • C Evaporation, condensation and precipitation.
  • D Condensation, evaporation and precipitation .