MCQ Class 9 Science Chapter 14 Natural Resources

Please refer to the MCQ Questions for Class 9 Science Chapter 14 Natural Resources. The following Natural Resources Class 9 Science MCQ Questions have been designed based on the latest syllabus and examination pattern for Class 9. Our experts have designed MCQ Questions for Class 9 Science with Answers for all chapters in your NCERT Class 9 Science book.

Natural Resources Class 9 MCQ Questions with Answers

See below Natural Resources Class 9 Science MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. Which of the following phenomenon refers to ‘ozone hole’ ?
(a) Absorption of carbon-dioxide by plants.
(b) Concentration of ozone as a whole.
(c) Much larger, seasonal, decrease in stratospheric ozone over polar regions of earth.
(d) None of these   

Question. Which of the following processes is not a part of the carbon cycle?
(a) Photosynthesis
(b) Transpiration
(c) Respiration
(d) Combustion 

Question. Ozone is a molecule containing
(a) three atoms of nitrogen
(b) two atoms of oxygen
(c) three atoms of oxygen
(d) two atoms of nitrogen  

Question. Heat reflected from earth’s surface is trapped in the atmosphere. What is the phenomenon called as?
(a) Global warming
(b) Ozone depletion
(c) The greenhouse effect
(d) Thermal pollution 

Question. Select the incorrect statement(s) regarding soil erosion.
1. Soil erosion can be prevented by terrace farming.
2. Overgrazing and terrace farming both promotes soil erosion.
3. Soil erosion decreases the fertility of soil.
(a) 1 and 2
(b) Only 2
(c) 2 and 3
(d) 1, 2 and 3 

Question. In which part of leguminous plants are nitrogen-fixing bacteria found?
(a) Root nodules
(b) Leaves
(c) Stems
(d) Flowers    

Question. How is ozone formed?
(a) Three carbon atoms combine to form ozone.
(b) Three oxygen atoms combine to form ozone.
(c) One carbon atom and two oxygen atoms split to form ozone.
(d) One oxygen atom and two hydrogen atoms split to form ozone. 

Question. Select the process(es) which is/are part of both carbon cycle and oxygen cycle.
(a) Photosynthesis
(b) Respiration
(c) Transpiration  
(d) Both a and b   

Question. Find the correct statement.
(a) Ozone is a pollutant.
(b) Ozone is a protector.
(c) Both (a) and (b)
(d) None of these  

Question. Find the factors that cause greenhouse effect.
(a) Ozone layer in the atmosphere
(b) Infrared light reaching the earth
(c) Moisture layer in the atmosphere
(d) CO₂ layer in the atmosphere   

Question. The elemental forms of carbon are
(a) diamond and graphite
(b) carbonate and graphite
(c) hydrogen carbonate and graphite
(d) carbonate and hydrogen carbonate   

Question. What if there is a sudden temperature change in both the rivers?
(a) Amount of dissolved oxygen will decrease.
(b) Amount of disease causing organisms will increase.
(c) Adversely affect the process of breeding of aquatic lives in both the rivers.
(d) Help in reducing the rate of pollution as most micro organisms and algae are susceptible to heat.   

Question. What does MAB stand for?
(a) Man and biosphere
(b) Man antibodies and bacterial
(c) Man and biotic community
(d) Mayer, Anderson and Bishby   

Question. ODS stands for
(a) Ozone developing substances
(b) Ozone depleting substances
(c) Ozone developing sources
(d) Ozone depleted sources

Question. What is meant by conserving the environment?
(a) Not destroying natural resources
(b) Not lowering the quality of the environment
(c) Changing natural resources from its original state
(d) Preserving the condition of the nature that has been destroyed   

Question. What is air composed of ?
(a) Nitrogen, oxygen, methane, carbon-dioxide and noble
(b) Nitrogen, oxygen, carbon-dioxide, water vapours and gases
(c) Nitrogen, carbon-dioxide, oxygen, carbon monoxide and gases
(d) Nitrogen, oxygen, carbon monoxide, water vapours and gases 

Question. Which gas associated with the greenhouse effect?
(a) Carbon-dioxide
(b) Oxygen
(c) Nitrogen dioxide
(d) Sulphur dioxide 

Question. ………. maintain the organic matter of the soil.
(a) Fungi and semi-parasites
(b) Cyanobacteria and parasitic animals
(c) Protozoans and slime moulds
(d) Bacteria and fungi     

Question. In the atmosphere, the two forms of oxygen found are
(a) glucose and ozone
(b) glucose and oxygen
(c) ozone and oxygen
(d) water and carbon dioxide 

Question. Ozone layer of atmosphere protects the living organisms from
(a) high temperature
(b) harmful radiations of sun
(c) hail and snow
(d) water pollution 

Question. Which of the following process converts nitrate to nitrous oxide and nitrogen gas?
(a) Nitrification
(b) Denitrification
(c) Nitrogen-fixation
(d) Geological cycle 

Question. The given figure shows a part of the carbon cycle.

(a) Decomposition
(b) Respiration
(c) Photosynthesis
(d) Nutrition   

FILL IN THE BLANK :

Question. One of the main aim of management of forests and wildlife is to conserve the ………. which we have inherited.    

Question. Uneven heating of air over the land and water-bodies causes ……….     

Question. ………. is 75% of the total surface of the Earth that is covered by water.    

Question. Evaporation of water from water-bodies and subsequent condensation gives us ……….     

Question. An ………. consists of two components ………. and biotic.    

TRUE/FALSE :

Question. Biosphere forms living mantle of Earth.     

Question. Winds develop due to uneven heating of Earth.     

Question. Presence of oxygen increases nitrogen fixation in Rhizobium.     

Question. Various nutrients are used again and again in a cyclic fashion   

Question. Carbon monoxide and carbon-dioxide of air produce acid rain.    

MATCHING QUESTIONS :

Question.

Question.

ASSERTION AND REASON :

DIRECTION : In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:
(a) Both assertion and reason are true and reason is the correct explanation of assertion.
(b) Both assertion and reason are true but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Both Assertion and Reason are false.

Question. Assertion : Like Earth, Moon and Venus also have atmosphere.
Reason : The atmosphere on Moon and Venus mainly comprises of carbon dioxide.   

Question. Assertion : We will not be able to survive on the Earth, if all plants become extinct.
Reason : Plants are the only source of oxygen in the atmosphere.    

Question. Assertion : Carbon monoxide is less dangerous than carbon dioxide.
Reason : Carbon monoxide is a non-poisonous gas.   

Question. Assertion : Lichens are indicators of pollution.
Reason : Lichens grow mainly in polluted areas. 

Question. Assertion : Carbon dioxide maintains the heat balance on the Earth.
Reason : Carbon dioxide has led to ozone depletion.