Here we are providing Class 9 Science Objective Chapter – 14 Natural Resources because its very important for Class 9 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 9 Science Objective Chapter – 14 Natural Resources is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 9 Science Objective Chapter – 14 Natural Resources 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 9 Science Objective Chapter – 14 Natural Resources
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
Ans – ( D )
2. When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of nitrogen?
( A ) It moves along with oxygen into the cells
( B ) It comes out with the carbon dioxide during exhalation
( C ) It is absorbed only by the nasal cells
( D ) Nitrogen concentration is already more in the cells, so itis not at all absorbed
Ans – ( B )
3. Outer crust of earth is called ……………..
( A ) Outer sphere
( B ) Lithosphere
( C ) Hydrosphere
( D ) None of them
Ans – ( B )
4. Out of the total land area, how many million hectares of land suffer from degradation?
( A ) 150
( B ) 175
( C ) 200
( D ) 225
Ans – ( B )
5.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.
Ans – ( B )
6. Water occupies earth surface called
( A ) Outer sphere
( B ) Lithosphere
( C ) Hydrosphere
( D ) Hemisphere
Ans – ( C )
7. 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
Ans – ( C )
8.One of the following factors does not lead to soil formation in nature
( A ) the Sun
( B ) water
( C ) wind
( D ) polythene bags
Ans – ( D )
9. Air covers the whole earth which we called……………….
( A ) Atmosphere
( B ) Lithosphere
( C ) Hydrosphere
( D ) Hemisphere
Ans – ( A )
10. Approximately 70 percent of the earth is covered by water. Of this amount, approximately _____ percent of it is suitable for human use.
( A ) 10
( B ) 25
( C ) 50
( D ) less than one
Ans – ( D )
11.What is the constitution of nitrogen in our atmosphere?
( A ) 28
( B ) 78
( C ) 55
( D ) 92
Ans – ( B )
12.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
Ans – ( C )
13. Hydrosphere and lithosphere interact and makes life possible is known as…………….
( A ) Lithosphere
( B ) Hydrosphere
( C ) Hemisphere
( D ) Biosphere
Ans – ( D )
14. Light bands of muscle fibre are made of the protein
( A ) Tubulin
( B ) Myosin
( C ) Actin
( D ) Myoglobin
Ans – ( C )
15.Rainfall patterns depend on
( A ) the underground water table
( B ) the number of water bodies in an area
( C ) the density pattern of human population in an area
( D ) the prevailing season in an area
Ans – ( B )
16. Air, water, and soil is…………………….. component
( A ) Biotic component
( B ) Abiotic component
( C ) A and b both
( D ) None of them
Ans – ( B )
17. Carbon is incorporated into life-forms through
( A ) Combustion
( B ) Photosynthesis
( C ) Digestion
( D ) Respiration
Ans – ( B )
18.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
Ans – ( A )
19. Ozone layer is getting depleted because of
( A ) excessive use of automobiles
( B ) excessive formation of industrial units
( C ) excessive use of man-made compounds containing both fluorine and chlorine
( D ) excessive deforestation
Ans – ( C )
20.Which of the following bacteria is responsible for nitrogen fixation?
( A ) Pseudomonas
( B ) Nitrosomonas
( C ) Rhizobium
( D ) None of these
Ans – ( C )
21.The nitrogen molecules present in air can be converted into nitrates and nitrites by
(а) a biological process of nitrogen fixing bacteria present in soil
( B ) a biological process of carbon fixing factor present in soil
( C ) any of the industries manufacturing nitrogenous compounds
( D ) the plants used as cereal crops in field
Ans – ( A )
22.One of the following factors does not lead to soil formation in nature.
( A ) The sun
( B ) Water
( C ) Wind
( D ) Polythene bags
Ans – ( D )
23. Lichens do not like to grow in cities because of –
( A ) SO2 pollution
( B ) Missing natural habitat
( C ) Absence of right type of algae and fungi
( D ) Lack of moisture
Ans – ( A )
24.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
Ans – ( D )
25.Which step is not involved in the carbon cycle?
( A ) Photosynthesis
( B ) Transpiration
( C ) Respiration
( D ) Burning of fossil fuels
Ans – ( B )
26. In nitrogen cycle, which bacteria are responsible for nitrification?
( A ) Rhizobium
( B ) Nitrosomonas
( C ) Nitrosomonas and Nitrobacter
( D ) Clostridium
Ans – ( C )
27.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
Ans – ( A )
28.The term “water-pollution” can be defined in several ways. Which of the following statements does not give the correct definition?
( A ) The addition of undesirable substances to water bodies
( B ) The removal of desirable substances from water bodies
( C ) A change in pressure of the water bodies
( D ) A change in temperature of the water bodies
Ans – ( C )
29. When can we say that we are not healthy?
( A ) You feel good physically.
( B ) You get constant headaches due to a stressful life.
( C ) You have a positive outlook towards life
( D ) You are able to cope well with the social pressures.
Ans – ( B )
30.Soil pollution mostly occurs by
( A ) Water
( B ) Fertilizers and insecticides
( C ) Mining
( D ) Crops
Ans – ( B )
31. Haversian system is typically found in bones of
( A ) fishes
( B ) aves
( C ) reptiles
( D ) mammals
Ans – ( D )
32.Which of the following is not a greenhouse gas?
( A ) Methane
( B ) Carbon dioxide
( C ) Carbon monoxide
( D ) Ammonia
Ans – ( D )
33.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%
Ans – ( A )
34. mog is the mixture of
( A ) smoke + CO2
( B ) smoke + nitrogen
( C ) smoke + fog
( D ) smoke + ozone
Ans – ( C )
35. Which of the following could be a cause for developing a disease?
( A ) Exercising properly
( B ) Having a balanced diet
( C ) Poor personal hygiene
( D ) Getting enough sleep
Ans – ( C )
36.Which step is not involved in the carbon-cycle?
( A ) Photosynthesis
( B ) Transpiration
( C ) Respiration
( D ) Burning of fossil fuels
Ans – ( B )
37. Which of the following is significant while diagnosing a disease?
( A ) Attire of the patient
( B ) Symptoms shown by the patient
( C ) Cultural background of the patient
( D ) Language spoken by the patient
Ans – ( B )
38.Oxygen is found in the elemental form in the atmosphere to the extent of
( A ) 78%
( B ) 38%
( C ) 21%
( D ) 95%
Ans – ( C )
39. Which of the following tissue has matrix, that is the source of its structural and functional performances?
( A ) connective tissue
( B ) muscular tissue
( C ) nervous tissue
( D ) epithelial tissue
Ans – ( B )
40.‘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
Ans – ( B )
41.You must have observed that during the winters sometimesit becomes quite difficult to see even the objects short distance apart. This low visibility during the cold weather is due to
( A ) Formation of fossil fuels
( B ) Unburnt carbon particles of hydrocarbons suspended in air
( C ) Lack of adequate power supply
( D ) None of these
Ans – ( B )
42. Which is not a function of humus?
( A ) It allows water and air to penetrate deep underground.
( B ) Humus greatly influences the soil structure of a region.
( C ) Humus kills the harmful bacteria present in soil.
( D ) Humus causes the soil to become more porous.
Ans – ( C )
43. What would happen if no agency is ensuring that garbage is collected and disposed off?
( A ) The garbage will begin decomposing faster
( B ) People will stop producing garbage
( C ) Surroundings will be unhygienic and create many health-related problems for the people
( D ) No change will be seen in the surroundings
Ans – ( C )
44.Ozone-layer is getting depleted because of
( A ) excessive use of automobiles
( B ) excessive formation of industrial Units
( C ) excessive use of man-made compounds containing both fluorine and chlorine
( D ) excessive deforestation.
Ans – ( C )
45. Major protein of connective tissue is
( A ) Myosin
( B ) Melanin
( C ) Collagen
( D ) Keratin
Ans – ( C )
46.Which of the following is a recently originated problem of environment?
( A ) Ozone layer depletion
( B ) Greenhouse effect
( C ) Global warming
( D ) All of the above
Ans – ( D )
47. Nitrogen-fixation by bacteria does not occur in the presence of
( A ) Oxygen
( B ) Hydrogen
( C ) Carbon dioxide
( D ) Sulphur
Ans – ( A )
48.When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of this nitrogen?
( A ) It moves along with oxygen into the cells
( B ) It comes out with the CO2 during exhalation
( C ) It is absorbed only by the nasal cells
( D ) Nitrogen concentration is already more in the cells so it is not at all absorbed.
Ans – ( B )
49. Through which process is oxygen returned to the atmosphere?
( A ) Combustion
( B ) Photosynthesis
( C ) Respiration
( D ) Formation of nitrogen oxides
Ans – ( B )
50.Top-soil contains the following
(а) Humus and living organisms only
( B ) Humus and soil particles only
( C ) Humus, living organisms and plants
( D ) Humus, living organisms and soil particles.
Ans – ( D )
51. Breakdown of bigger rocks into fine smaller mineral particles is called
( A ) Paedogenesis
( B ) Mineralization
( C ) Cracking
( D ) Weathering
Ans – ( D )
52.The ‘water pollution’ can be defined in several ways. Which of the following statements does not give the correct definition?
( A ) The addition of the undesirable substances to water bodies
( B ) The removal of the desirable substances from water bodies
(c)A change in pressure of the water bodies
( D ) A change in temperature of the water bodies
Ans – ( C )
53.Choose the correct sequences
( A ) CO2 in atmosphere → decomposers → organic carbon in animals → organic carbon in plants
( B ) CO2 in atmosphere → organic carbon in plants → organic carbon in animals → inorganic carbon in soil
( C ) Inorganic carbonates in water organic carbon in plants → organic carbon in animals → scavengers
( D ) Organic carbon in animals → decomposers → CO2 in atmosphere → organic carbon in plants
Ans – ( B )
54. The greenhouse effect is due to
( A ) Impermeability of long wavelength radiations through CO2 of the atmosphere
( B ) Penetrability of low wavelength raditions through O3 layer
( C ) Penetrability of low wavelength radiations through CO2
( D ) Impermeability of long wavelength radiations through O3 layer
Ans – ( A )
55.Major source of mineral in soil is the
( A ) parent rock from which soil is formed
( B ) plants
( C ) animals
( D ) bacteria
Ans – ( A )
56. Which of the following is not a symptom of any disease?
( A ) Meningitis
( B ) Headache
( C ) Cough
( D ) Swelling
Ans – ( A )
57. Which of the following mainly decides biodiversity in a particular area?
( A ) Depth of bottom soil
( B ) Different layers of soil
( C ) Chemical composition of middle soil
( D ) Quality of topsoil
Ans – ( D )
58.Which of the following is the literal meaning of disease?
( A ) Being happy
( B ) Being unaware
( C ) Being uncomfortable
( D ) Being uncomplicated
Ans – ( C )
59.Total Earth’s surface covered by water is
( A ) 75%
( B ) 60%
( C ) 85%
( D ) 50%
Ans – ( A )
60. Carbon dioxide in atmospheric air amounts to be about
( A ) 0.003%
( B ) 33%
( C ) 0.03%
( D ) 0.3%
Ans – ( C )
61. Which of the following is not necessarily required to keep ourselves healthy?
( A ) Good economic conditions
( B ) Healthy food
( C ) Well-furnished house
( D ) Social equality and harmon
Ans – ( C )
62.Biotic component of the biosphere is not constituted by
( A ) producers
( B ) consumers
( C ) decomposer
( D ) air
Ans – ( D )
63. In nutrient cycle, minerals tend to be dispersed through
( A ) evaporation
( B ) assimilation
( C ) surface and sub-surface run off
( D ) convection
Ans – ( C )
64.An increase in carbon dioxide content in the atmosphere would not cause
( A ) more heat to be retained by the environment
( B ) increase in photosynthesis in plants
( C ) global warming
( D ) abundance of desert plants
Ans – ( D )
65.The correct match for atmospheric gases is
( A ) Nitrogen- 0.03%, Oxygen- 20.95%, Argon- 0.93% and Carbon dioxide-78.08%
( B ) Nitrogen- 78.08%, Oxygen- 20.95%, Argon- 0.93% and Carbon dioxide- 20.02%
( C ) Nitrogen- 0.03%, Oxygen- 0.03%, Argon- 20.95% and Carbon dioxide- 1.02%
( D ) Nitrogen- 78.08%, Oxygen- 20.95%, Argon- 0.93% and Carbon dioxide- 0.03%
Ans – ( D )
66. Which of the following does not cause water pollution?
( A ) Addition of mercury salts to water body.
( B ) Addition of disease-causing bacteria to water body.
( C ) Addition of dissolved oxygen to water body.
( D ) Addition of fertilizers to water body.
Ans – ( C )
