MCQ Questions for Class 9 Science Chapter 14 Natural Resources
Solving the Natural Resources Multiple Choice Questions of Class 9 Science Chapter 14 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Natural Resources Class 9 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 14 Science Class 9 and cross-check your answers during preparation.
Multiple Choice Questions
Question 1.
What is the constitution of nitrogen in our atmosphere?
(a) 28
(b) 78
(c) 55
(d) 92
Answer
Answer: (b) 78
Question 2.
Which of the following bacteria is responsible for nitrogen fixation?
(a) Pseudomonas
(b) Nitrosomonas
(c) Rhizobium
(d) None of these
Answer
Answer: (c) Rhizobium
Question 3.
One of the following factors does not lead to soil formation in nature.
(a) The sun
(b) Water
(c) Wind
(d) Polythene bags
Answer
Answer: (d) Polythene bags
Question 4.
Which step is not involved in the carbon cycle?
(a) Photosynthesis
(b) Transpiration
(c) Respiration
(d) Burning of fossil fuels
Answer
Answer: (b) Transpiration
Question 5.
The main function of the Rhizobium bacteria is:
(a) To convert free nitrogen into nitrates
(b) To convert the nitrates into nitrogen
(c) Decomposition of ammonium salts
(d) Denitrification
Answer
Answer: (a) To convert free nitrogen into nitrates
Question 6.
Soil pollution mostly occurs by:
(a) Water
(b) Fertilizers and insecticides
(c) Mining
(d) Crops
Answer
Answer: (b) Fertilizers and insecticides
Question 7.
What is the percentage constitution of carbon dioxide in the atmosphere of Venus and Mars?
(a) 95 – 97%
(b) 20 – 22%
(c) 35 – 40%
(d) 70 – 72%
Answer
Answer: (a) 95 – 97%
Question 8.
Oxygen is found in the elemental form in the atmosphere to the extent of:
(a) 78%
(b) 38%
(c) 21%
(d) 95%
Answer
Answer: (c) 21%
Fill in the Blanks.
Question 9.
In Venus and Mars, the major component of the atmosphere is found to be _______
Answer
Answer: carbon dioxide
Question 10.
Air, water, and soil are the _______ component of the biosphere.
Answer
Answer: abiotic
Question 11.
Biogeochemical cycles always ______ in nature.
Answer
Answer: run/operate
Question 12.
Carbon dioxide is one of the _______
Answer
Answer: greenhouse gas
Question 13.
Oxygen is returned to the atmosphere through only one major process, that is _______
Answer
Answer: photosynthesis
Question 14.
Elemental oxygen is normally found in the form of a _______ molecule.
Answer
Answer: diatomic
Question 15.
Uneven heating of air over land and water bodies causes ________
Answer
Answer: winds
Question 16.
The most important green house gas is ________
Answer
Answer: CO2
Question 17.
Chlorofluorocarbon is destroying ________ layer.
Answer
Answer: ozone
Question 18.
Apart from microbes _________ are helpful in the humus formation.
Answer
Answer: earthworms
True/False.
Question 19.
Freshwater is found frozen in the ice-caps at the two poles and on snowcovered mountains.
Answer
Answer: True
Question 20.
Rainfall patterns depend on the prevailing wind patterns in an area.
Answer
Answer: True
Question 21.
The total momentum of an isolated system is not conserved.
Answer
Answer: False
Question 22.
The ozone layer protects us from ultraviolet radiation.
Answer
Answer: True
Question 23.
The decomposition of organic substances causes air pollution.
Answer
Answer: False
Question 24.
During the day, the direction of the wind would be from the sea to the land.
Answer
Answer: True
Question 25.
Organisms called lichens are found to be very sensitive to the levels of contaminants like sulphur dioxide in the air.
Answer
Answer: True
Match the Column.
Question 26.
| A | B |
| 1. Ozone layer | (i) 21% |
| 2. Nitrogen | (ii) Rhizobium |
| 3. Amount of CO2 in atmosphere | (iii) O3 |
| 4. Nitrogen Fixation | (iv) 0.03% |
| 5. Amount of oxygen | (v) 78% |
Answer
Answer:
| A | B |
| 1. Ozone layer | (iii) O3 |
| 2. Nitrogen | (v) 78% |
| 3. Amount of CO2 in atmosphere | (iv) 0.03% |
| 4. Nitrogen Fixation | (ii) Rhizobium |
| 5. Amount of oxygen | (i) 21% |
Answer in one Word/Sentence.
Question 27.
What is the full name of C.F.C.?
Answer
Answer: Chlorofluorocarbon
Question 28.
Write the chemical (molecular) formula of chlorofluorocarbon (C.F.C.)?
Answer
Answer: CCl2F2
Question 29.
What name is given to increase in general temperature of the atmosphere globally due to the activities of mankind?
Answer
Answer: Global warming
Question 30.
What is the chemical formula of ozone?
Answer
Answer: O3
Question 31.
What is the major factor in deciding the soil structure?
Answer
Answer: Humus
Question 32.
What is the surface temperature of the Moon?
Answer
Answer: -190°C to 110°C
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