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MCQ Questions for Class 9 Science Chapter 14 Natural Resources with Answers
MCQ Questions for Class 9 Science Chapter 14 Natural Resources with Answers
Question 1.
The atmosphere of the Earth is heated by radiations which are mainly
(a) radiated by the Sun
(b) re-radiated by land
(c) re-radiated by water
(d) re-radiated by land and water
Answer: (d) re-radiated by land and water
Question 2.
If there were no atmosphere around the Earth, the temperature of the Earth will
(a) increase
(b) go on decreasing
(c) increase during day and decrease during night
(d) be unaffected
Answer: (c) increase during day and decrease during night
Question 3.
What would happen, if all the oxygen present in the environment is converted to ozone?
(a) We will be protected more
(b) It will become poisonous and kill living forms
(c) Ozone is not stable, hence it will be toxic
(d) It will help harmful Sun radiations to reach Earth and damage many life forms.
Answer: (b) It will become poisonous and kill living forms
Question 4.
One of the following factors does not lead to soil formation in nature
(a) the Sun
(b) water
(c) wind
(d) polythene bags
Answer: (d) polythene bags
Question 5.
The two forms of oxygen found in the atmosphere are
(a) water and ozone
(b) water and oxygen
(c) ozone and oxygen
(d) water and carbon dioxide
Answer: (c) ozone and oxygen
Which step is not involved in the carbon-cycle?
(o) Photosynthesis
(b) Transpiration
(c) Respiration
(d) Burning of fossil fuels
Answer: (b) Transpiration
‘Ozone-hole’ means
(a) a large sized hole in the ozone layer
(b) thinning of the ozone layer
(c) small holes scattered in the ozone layer
(d) thickening of ozone in the ozone layer
Answer: (b) thinning of the ozone layer
Question 8.
Among the given options, which one is not correct for the use of large amount of fertilisers and pesticides?
(a) They are eco-friendly
(b) They turn the fields barren after some time
(c) They adversely affect the useful component from the soil
(d) They destroy the soil fertility
Answer: (a) They are eco-friendly
Question 9.
Which of the following is not a greenhouse gas?
(a) Methane
(b) Carbon dioxide
(c) Carbon monoxide
(d) Ammonia
Answer: (d) Ammonia
Question 10.
One of the following processes is not a step involved in the water-cycle operating in nature
(a) evaporation
(b) transpiration
(c) precipitation
(d) photosynthesis
Answer: (d) photosynthesis
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