Natural Resources MCQ for Class 9 Science Chapter 14 with Answers

We have completed the NCERT/CBSE chapter-wise Multiple Choice Questions for Class 9 Science book Chapter 14 Natural Resources with Answers by expert subject teacher for latest syllabus and examination. You can Prepare effectively for the exam taking the help of the Class 9 Science Objective Questions PDF free of cost from here. Students can take a free test of the Multiple Choice Questions of Natural Resources. Each Questions has four options followed by the right answer. Download the Science Quiz Questions with Answers for Class 9 free Pdf and prepare to exam and help students understand the concept very well.

MCQ Questions for Class 9 Science with Answers Biology

Q1. Which of the following bacteria is responsible for nitrogen fixation?

(i) Pseudomonas
(ii) Nitrosomonas
(iii) Rhizobium
(iv) None of these

(iii) Rhizobium

Q2. When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of nitrogen?

(i) It moves along with oxygen into the cells
(ii) It comes out with the carbon dioxide during exhalation
(iii)It is absorbed only by the nasal cells
(iv) Nitrogen concentration is already more in the cells, so itis not at all absorbed

(ii) It comes out with the carbon dioxide during exhalation

Q3. If there were no atmosphere around the Earth, the temperature of the Earth will

(i) increase
(ii) go on decreasing
(iii) increase during day and decrease during night
(iv) be unaffected

(iii) increase during day and decrease during night

Q4. Out of the total land area, how many million hectares of land suffer from degradation?

(i) 150
(ii) 175
(iii) 200
(iv) 225

(ii) 175

Q5. One of the following factors does not lead to soil formation in nature.

(i) The sun
(ii) Water
(iii) Wind
(iv) Polythene bags

(iv) Polythene bags

Q6. 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:

(i) Formation of fossil fuels
(ii) Unburnt carbon particles of hydrocarbons suspended in air
(iii) Lack of adequate power supply
(iv) None of these

(ii) Unburnt carbon particles of hydrocarbons suspended in air

Q7. What would happen, if all the oxygen present in the environment is converted to ozone?

(i) We will be protected more
(ii) It will become poisonous and kill living forms
(iii) Ozone is not stable, hence it will be toxic
(iv) It will help harmful Sun radiations to reach Earth and damage many life forms.

(ii) It will become poisonous and kill living forms

Q8. Light bands of muscle fibre are made of the protein:

(i) Tubulin
(ii) Myosin
(iii) Actin
(iv) Myoglobin

(iii) Actin

Q9. The main function of the Rhizobium bacteria is:

(i) To convert free nitrogen into nitrates
(ii) To convert the nitrates into nitrogen
(iii) Decomposition of ammonium salts
(iv) Denitrification

(i) To convert free nitrogen into nitrates

Q10. 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?

(i) Pressure difference between the air of two regions
(ii) Moving leaves of the plants
(iii)Temperature difference between the two regions
(iv) Striking of air with the mountains

(iii) Temperature difference between the two regions

Q11. The two forms of oxygen found in the atmosphere are

(i) water and ozone
(ii) water and oxygen
(iii) ozone and oxygen
(iv) water and carbon dioxide

(iii) ozone and oxygen

Q12. Haversian system is typically found in bones of

(i) fishes
(ii) aves
(iii) reptiles
(iv) mammals

(iv) mammals

Q13. Soil pollution mostly occurs by:

(i) Water
(ii) Fertilizers and insecticides
(iii) Mining
(iv) Crops

(ii) Fertilizers and insecticides

Q14. The nitrogen molecules present in air can be converted into nitrates by:

(i) A biological process of nitrogen fixing bacteria present in the soil
(ii) A biological process of carbon fixing factor present in the soil
(iii) Any of the industries manufacturing nitrogenous compounds
(iv) The plants used as cereal crops in field

(i) A biological process of nitrogen fixing bacteria present in the soil

Q15. Rainfall patterns depend on

(i) the underground water table
(ii) the number of water bodies in an area
(iii) the density pattern of human population in an area
(iv) the prevailing season in an area

(ii) elemental form of oxygen

Q16. Which of the following tissue has matrix, that is the source of its structural and functional performances?

(i) connective tissue
(ii) muscular tissue
(iii) nervous tissue
(iv) epithelial tissue

(i) connective tissue

Q17. Oxygen is found in the elemental form in the atmosphere to the extent of:

(i) 78%
(ii) 38%
(iii) 21%
(iv) 95%

(iii) 21%

Q18. Top soil is the best for the vegetation. The main components ofthis productive top layer are:

(i) Humus and living organisms only
(ii) Humus and soil particles only
(iii) Humus, living organisms and plants
(iv) Humus, living organisms and soil particles

(ii) Humus and soil particles only

Q19. One of the following processes is not a step involved in the water-cycle operating in nature

(i) evaporation
(ii) transpiration
(iii) precipitation
(iv) photosynthesis

(iv) photosynthesis

Q20. Nitrogen-fixation by bacteria does not occur in the presence of:

(i) Oxygen
(ii) Hydrogen
(iii) Carbon dioxide
(iv) Sulphur

(i) Oxygen

Q21. The process of nitrogen fixation by bacteria does not take place in the presence of:

(i) Molecular form of hydrogen
(ii) Elemental form of oxygen
(iii) Water
(iv) Elemental form of nitrogen

(ii) Elemental form of oxygen

Q22. Which of the following is not a greenhouse gas?

(i) Methane
(ii) Carbon dioxide
(iii) Carbon monoxide
(iv) Ammonia

(iv) Ammonia

Q23. Breakdown of bigger rocks into fine smaller mineral particles is called:

(i) Paedogenesis
(ii) Mineralization
(iii) Cracking
(iv) Weathering

(iv) Weathering

Q24. Which of the following is a recently originated problem of environment?

(i) Ozone layer depletion
(ii) Greenhouse effect
(iii) Global warming
(iv) All of the above

(iv) All of the above

Q25. In nutrient cycle, minerals tend to be dispersed through

(i) evaporation
(ii) assimilation
(iii) surface and sub-surface run off
(iv) convection

(iii) surface and sub-surface run off

Q26. Major source of mineral in soil is the

(i) parent rock from which soil is formed
(ii) plants
(iii) animals
(iv) bacteria

(i) parent rock from which soil is formed

Q27. Volkmann’s canals occur in :-

(i) Cartilage
(ii) Bone
(iii) Internal ear
(iv) Liver

(ii) Bone

Q28. Biotic component of the biosphere is not constituted by

(i) producers
(ii) consumers
(iii) decomposer
(iv) air

(iv) air

Q29. Wrinkling in old age is due to

(i) collagen
(ii) myosin
(iii) keratin
(iv) actin

(i) collagen

Q30. Oxygen is harmful for

(i) ferns
(ii) nitrogen fixing bacteria
(iii) chara
(iv) mango tree

(ii) nitrogen fixing bacteria

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Natural Resources MCQ Questions for Class 9 Science Chapter 14 with Answers