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.

AB
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:

AB
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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