Check the below NCERT MCQ Questions for Class 9 Science Chapter 14 Natural Resources with Answers Pdf free download. MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. We have Provided Natural Resources Class 9 Science MCQs Questions with Answers to help students understand the concept very well.
You can refer to NCERT Solutions for Class 9 Science Chapter 14 Natural Resources to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Q1.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
Q2.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
Answer: (b) Unburnt carbon particles of hydrocarbons suspended in air
Q3.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
Q4.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
Answer: (c) A change in pressure of the water bodies
Q5.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
Q6.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
Q7.Presence of the fertilizers and sewage in polluted water provides a lot of nitrogen, causing excessive growth of algae which subsequently reduces the amount of dissolved oxygen in water.Can you name this process of reduction of dissolved oxygen due to the excess growth of algae.
(a) Biomagnifications
(b) Eutrophication
(c)Algal bloom
(d) Decopmposition
Answer: (b) Eutrophication
Q8.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
Q9.A cool breeze after a hot day brings all of us considerable relief. This breeze is actually the moving air. What is the basic process that causes this movement of air?
(a) Pressure difference between the air of two regions
(b) Moving leaves of the plants
(c)Temperature difference between the two regions
(d) Striking of air with the mountains
Answer: (c) Temperature difference between the two regions
Q10.The process of nitrogen-fixation by bacteria does not take place in the presence of
(a) molecular form of hydrogen
(b) elemental form of oxygen
(c) water
(d) elemental form of nitrogen
Answer: (b) elemental form of oxygen
Q11.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: (a) To convert free nitrogen into nitrates
Q12.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
Answer: (b) elemental form of oxygen
Q13.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
Q14.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
Answer: (а) a biological process of nitrogen fixing bacteria present in soil
Q15.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
Q16.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
Answer: (c) A change in pressure of the water bodies
Q17.Which of the following is not a greenhouse gas?
(a) Methane
(b) Carbon dioxide
(c) Carbon monoxide
(d) Ammonia
Answer: (d) Ammonia
Q18.Which step is not involved in the carbon-cycle?
(o) Photosynthesis
(b) Transpiration
(c) Respiration
(d) Burning of fossil fuels
Answer: (b) Transpiration
Q19.‘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
Q20.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.
Answer: (c) excessive use of man-made compounds containing both fluorine and chlorine
Class 9 Science Chemistry MCQ
| Chapter 1 Matter in Our Surroundings |
| Chapter 2: Is Matter Around Us Pure |
| Chapter 3: Atoms and Molecules |
| Chapter 4: Structure of the Atom |
Class 9 Science Biology MCQ
| Chapter 5: The Fundamental Unit of Life |
| Chapter 6: Tissues |
| Chapter 7: Diversity in Living Organisms |
| Chapter 13: Why do we Fall Ill |
| Chapter 14: Natural Resources |
| Chapter 15: Improvement in Food Resources |
Class 9 Science Physics MCQ
| Chapter 8: Motion |
| Chapter 9: Force and Laws of Motion |
| Chapter 10: Gravitation |
| Chapter 11: Work and Energy |
| Chapter 12: Sound |
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