Welcome to our comprehensive guide on Natural Resources Class 9 MCQ designed to enhance your understanding of the natural resources that our planet provides. This set of multiple-choice questions is tailored specifically for Class 9 students, aiming to deepen their knowledge of the various natural elements and phenomena that sustain life on Earth.
Natural resources are materials or substances occurring in nature which can be exploited for economic gain or used to fulfill human needs—from the water we drink to the minerals we utilize in electronics. This module covers essential topics such as the classification of natural resources, their importance, conservation methods, and the role these resources play in our everyday lives.
Through Natural Resources Class 9 MCQ, students will explore the intricate balance of our ecosystem and develop a greater appreciation for the natural assets that are so vital yet often taken for granted. These questions not only reinforce textbook knowledge but also encourage critical thinking about how we can protect and preserve our environment for future generations. Prepare to challenge yourself and expand your understanding of the world with each question. Let’s embark on this educational journey together, ensuring a thorough grasp of natural resources and their significance.
Class 9 Science Natural Resources MCQ
Ques 1. The life-supporting zone of the Earth is:
a) Lithosphere
b) Biosphere
c) Hydrosphere
d) Atmosphere
Answer: b) Biosphere
Ques 2. Molecules of proteins contain:
a) Carbon
b) Nitrogen
c) Oxygen
d) All of these
Answer: d) All of these
Ques 3. On the Moon, the temperature ranges from -190°C to 110°C because:
a) Water bodies are present
b) There is no biogeochemical cycle
c) There is no atmosphere
d) No water bodies are present
Answer: c) There is no atmosphere
Ques 4. Burning fossil fuels adds:
a) CO2, SO2, NO2 gases to the air
b) CO, SO3, NO3 gases to the air
c) CH4, CO2, NO2 gases to the air
d) C, SO2, N2 gases to the air
Answer: a) CO2, SO2, NO2 gases to the air
Ques 5. The microorganism that helps in forming soil is:
a) Lichen
b) Bacteria
c) Moss
d) Both b) and c)
Answer: a) Lichen
Ques 6. Nitrogen fixation can be done by:
a) Industries
b) Rhizobium
c) Lightning
d) All of the above
Answer: d) All of the above
Also Check: Natural Resources Class 9 Extra Questions Science Chapter 14
Ques 7. Soil is part of the:
a) Atmosphere
b) Lithosphere
c) Hydrosphere
d) Ionosphere
Answer: b) Lithosphere
Ques 8. The atmosphere maintains the Earth’s temperature because:
a) It absorbs heat rays
b) It contains water vapor
c) It reflects heat rays
d) It holds air, which is a bad conductor of heat
Answer: d) It holds air, which is a bad conductor of heat
Ques 9. Greenhouse gases include:
a) Rhizobium
b) Lightning
c) All of the above
d) Industries
Answer: c) All of the above
Ques 10. Nitrogen fixation is:
a) Conversion of nitrogen to ammonia
b) Conversion of nitrogen to nitrates
c) Conversion of nitrogen to amino acids
d) Both a) and b)
Answer: d) Both a) and b)
Ques 11. The major component of the atmosphere on Mars and Venus is:
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Ozone
Answer: b) Carbon dioxide
Ques 12. Depletion of ozone molecules in the stratosphere is due to:
a) Chlorine compounds
b) Fluorine compounds
c) Halogen compounds
d) None of these
Answer: a) Chlorine compounds
Ques 13. Life cannot be sustained on Mars and Venus because the major component in their atmosphere is:
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Ozone
Answer: b) Carbon dioxide
Ques 14. If there were no atmosphere around the Earth, the temperature would:
a) Increase
b) Decrease continuously
c) Increase during the day and decrease at night
d) Remain unaffected
Answer: c) Increase during the day and decrease at night
Ques 15. Ozone layer depletion is mainly caused by:
a) Excessive use of automobiles
b) Excessive formation of industrial units
c) Excessive use of man-made compounds containing fluorine and chlorine
d) Excessive deforestation
Answer: c) Excessive use of man-made compounds containing fluorine and chlorine
Also Check: Natural Resources Class 9 Notes Science Chapter 14
Ques 16. CO2 and O2 balance in the atmosphere is maintained by:
a) Photosynthesis
b) Respiration
c) Leaf anatomy
d) Photorespiration
Answer: a) Photosynthesis
Ques 17. The outer crust of the Earth is called the:
a) Outer sphere
b) Lithosphere
c) Hydrosphere
d) None of them
Answer: b) Lithosphere
Ques 18. When we breathe in air, nitrogen:
a) Moves along with oxygen into the cells
b) Comes out with carbon dioxide during exhalation
c) Is absorbed only by nasal cells
d) Is not absorbed as its concentration is already high in the cells
Answer: b) Comes out with carbon dioxide during exhalation
Ques 19. The component of the environment consisting of air, water, and soil is:
a) Biotic component
b) Abiotic component
c) Both a) and b)
d) None of these
Answer: b) Abiotic component
Ques 20. A renewable source of energy is:
a) Petroleum
b) Coal
c) Nuclear fuel
d) Trees
Answer: d) Trees
Ques 21. Which of the following is a free-living nitrogen-fixing bacterium in the soil?
a) Azotobacter
b) Nitrosomonas
c) Rhizobium
d) Pseudomonas
Answer: a) Azotobacter
Ques 22. Rainfall patterns depend on:
a) The underground water table
b) The number of water bodies in an area
c) The density of human population in an area
d) The prevailing season in an area
Answer: b) The number of water bodies in an area
Ques 23. Nodules in the roots of legume plants contain:
a) Nitrogen-fixing bacteria
b) Sulfur-fixing bacteria
c) Potassium-fixing bacteria
d) None of the above
Answer: a) Nitrogen-fixing bacteria
Ques 24. The step not involved in the carbon cycle is:
a) Photosynthesis
b) Transpiration
c) Respiration
d) Burning of fossil fuels
Answer: b) Transpiration
Ques 25. The Earth’s surface covered by water is:
a) 75%
b) 60%
c) 85%
d) 50%
Answer: a) 75%
Ques 26. The ‘water pollution’ definition that is incorrect is:
a) Addition of undesirable substances to water bodies
b) Removal of desirable substances from water bodies
c) Change in pressure of the water bodies
d) Change in temperature of the water bodies
Answer: c) Change in pressure of the water bodies
Ques 27. Microorganisms living in a pond that are autotrophic are:
a) Crab
b) Fish
c) Blue-green algae
d) Fungus
Answer: c) Blue-green algae
Ques 28. The protein that makes skin cells waterproof is:
a) Keratin
b) Elastin
c) Collagen
d) Mucus
Answer: a) Keratin
Also Check: NCERT Solutions for Class 9 Science Chapter 14 Natural Resources
Ques 29. Smog is a mixture of:
a) Smoke + CO2
b) Smoke + nitrogen
c) Smoke + fog
d) Smoke + ozone
Answer: c) Smoke + fog
Ques 30. Ozone layer occurs at a height of:
a) 8-10 km above poles
b) 8-10 km above the equator
c) 20-26 km above the Earth’s surface
d) 11-16 km above the equator
Answer: c) 20-26 km above the Earth’s surface
Ques 31. Increase in harmful substances in the air is called:
a) Air pollution
b) Droplets
c) Water vapor
d) None of these
Answer: a) Air pollution
Ques 32. Major component of the atmosphere on Mars and Venus is:
a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Water vapor
Answer: a) Carbon dioxide
Ques 33. Through which process is oxygen returned to the atmosphere?
a) Combustion
b) Photosynthesis
c) Respiration
d) Formation of nitrogen oxides
Answer: b) Photosynthesis
Ques 34. Total surface of Earth covered by water is:
a) 75%
b) 60%
c) 85%
d) 50%
Answer: a) 75%
Ques 35. Which of the following is not a “Greenhouse gas”?
a) SO2
b) CO2
c) N2O
d) CH4
Answer: a) SO2
Ques 36. Soil erosion can be prevented by:
a) Deforestation
b) Afforestation
c) Overgrazing
d) Removal of vegetation
Answer: b) Afforestation
Ques 37. In the nutrient cycle, minerals are dispersed through:
a) Evaporation
b) Assimilation
c) Surface and sub-surface runoff
d) Convection
Answer: c) Surface and sub-surface runoff
Ques 38. The protein that makes skin cells waterproof is:
a) Keratin
b) Elastin
c) Collagen
d) Mucus
Answer: a) Keratin
Ques 39. If all oxygen is converted to ozone, what would happen?
a) We will be protected more
b) It will become poisonous and kill all living forms
c) Ozone is not stable, hence it will be toxic
d) It will allow harmful sun radiations to reach Earth and damage many life forms
Answer: b) It will become poisonous and kill all living forms
Ques 40. The fate of nitrogen when we breathe in air:
a) Moves with oxygen into the cells
b) Comes out with carbon dioxide during exhalation
c) Absorbed only by nasal cells
d) Not absorbed as its concentration is already high in cells
Answer: b) Comes out with carbon dioxide during exhalation
Also Check: NCERT Exemplar Solutions for Class 9 Science Chapter 14 Natural Resources
Ques 41. What happens if the carbon dioxide content in the atmosphere increases?
a) Amount of heat retained by the environment increases
b) Photosynthesis in plants is affected
c) Global warming occurs
d) Existence of desert plants remains unaffected
Answer: d) Existence of desert plants remains unaffected
Ques 42. A pollutant is any substance that changes the natural:
a) Geo-chemical cycle
b) Flora of a place
c) Balance of our environment
d) Wildlife of a region
Answer: c) Balance of our environment
Ques 43. The life-supporting zone of the Earth is:
a) Lithosphere
b) Hydrosphere
c) Atmosphere
d) Biosphere
Answer: d) Biosphere
Ques 44. Depletion of ozone molecules in the stratosphere is due to:
a) Halogen compounds
b) Fluorine compounds
c) Chlorine compounds
d) None of the options
Answer: a) Halogen compounds
Ques 45. Marked temperature changes in an aquatic environment can affect:
a) Breeding of animals
b) More growth of aquatic plants
c) Process of digestion in animals
d) Availability of nutrients
Answer: a) Breeding of animals
Ques 46. Coal is an:
a) Exhaustible resource
b) Inexhaustible resource
c) Potential resource
d) None of these
Answer: a) Exhaustible resource
Ques 47. Plants and animals are known as:
a) Biotic resources
b) Abiotic resources
c) Machines
d) None of these
Answer: a) Biotic resources
Ques 48. Acid rain mainly contains:
a) Nitric acid
b) Hydrochloric acid
c) Sulfuric acid
d) Both a) and c)
Answer: d) Both a) and c)
Ques 49. Atmosphere maintains the Earth’s temperature because:
a) It absorbs heat rays
b) It contains water vapor
c) It reflects heat rays
d) It holds air, which is a bad conductor of heat
Answer: d) It holds air, which is a bad conductor of heat
Ques 50. Water is a:
a) Good conductor of heat
b) Bad conductor of heat
c) More conductor of heat
d) Less conductor of heat
Answer: a) Good conductor of heat
