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Chapters
2: Is Matter Around Us Pure
3: Atoms and Molecules
4: Structure of the Atom
5: The Fundamental Unit of Life
6: Tissues
7: Diversity In Living Organisms
8: Motion
9: Force and Laws of Motion
10: Gravitation
11: Work and Energy
12: Sound
13: Why Do We Fall Ill
▶ 14: Natural Resources
15: Improvement In Food Resources
![NCERT Exemplar solutions for Science [English] Class 9 chapter 14 - Natural Resources - Shaalaa.com](/images/science-english-class-9_6:5f2b1b2038084cf381bfa42c826a928c.jpg "NCERT Exemplar solutions for Science [English] Class 9 chapter 14 - Natural Resources")
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Solutions for Chapter 14: Natural Resources
Below listed, you can find solutions for Chapter 14 of CBSE NCERT Exemplar for Science [English] Class 9.
NCERT Exemplar solutions for Science [English] Class 9 14 Natural Resources Multiple Choice Questions [Pages 79 - 83]
The atmosphere of the earth is heated by radiations which are mainly
radiated by the sun
re-radiated by land
re-radiated by water
re-radiated by land and water
If there were no atmosphere around the earth, the temperature of the earth will
increase
go on decreasing
increase during the day and decrease during the night
be unaffected
What would happen, if all the oxygen present in the environment is converted to ozone?
We will be protected more
It will become poisonous and kill living forms
Ozone is not stable, hence it will be toxic
It will help harmful sun radiations to reach earth and damage many life forms.
One of the following factors does not lead to soil formation in nature
the sun
water
wind
polythene bags
The two forms of oxygen found in the atmosphere are
water and ozone
water and oxygen
ozone and oxygen
water and carbon-dioxide
The process of nitrogen-fixation by bacteria does not take place in the presence of
the molecular form of hydrogen
the elemental form of oxygen
water
the elemental form of nitrogen
Rainfall patterns depend on
the underground water table
the number of water bodies in an area
the density pattern of human population in an area
the prevailing season in an area
Among the given options, which one is not correct for the use of large amounts of fertilisers and pesticides?
They are eco-friendly
They turn the fields barren after some time
They adversely affect the useful component from the soil
They destroy the soil fertility
The nitrogen molecules present in the air can be converted into nitrates and nitrites by
a biological process of nitrogen-fixing bacteria present in the soil
a biological process of carbon fixing factor present in the soil
any of the industries manufacturing nitrogenous compounds
the plants used as cereal crops in the field
One of the following processes is not a step involved in the water-cycle operating in nature
evaporation
transpiration
precipitation
photosynthesis
The term “water-pollution” can be defined in several ways. Which of the following statements does not give the correct definition?
The addition of undesirable substances to water-bodies
The removal of desirable substances from water-bodies
A change in pressure of the water bodies
A change in temperature of the water bodies
Which of the following is not a greenhouse gas?
Methane
Carbon dioxide
Carbon monoxide
Ammonia
Which step is not involved in the carbon cycle?
Photosynthesis
Transpiration
Respiration
Burning of fossil fuels
‘Ozone-hole’ means
a large-sized hole in the ozone layer
thinning of the ozone layer
small holes scattered in the ozone layer
thickening of ozone in the ozone layer
Ozone-layer is getting depleted because of
excessive use of automobiles
excessive formation of industrial units
excessive use of man-made compounds containing both fluorine and chlorine
excessive deforestation.
Which of the following is a recently originated problem of the environment?
Ozone layer depletion
Greenhouse effect
Global warming
All of the above
When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of this nitrogen?
It moves along with oxygen into the cells
It comes out with the CO2 during exhalation
It is absorbed only by the basal cells
Nitrogen concentration is already more in the cells so it is not at all absorbed.
Top-soil contains the following
Humus and living organisms only
Humus and soil particles only
Humus, living organisms and plants
Humus, living organisms and soil particles.
Choose the correct sequences
CO2 in the atmosphere → decomposers → organic carbon in animals → organic carbon in plants
CO2 in atmosphere → organic carbon in plants → organic carbon in animals → inorganic carbon in soil
Inorganic carbonates in water → organic carbon in plants → organic carbon in animals → scavengers
Organic carbon in animals → decomposers → CO2 in the atmosphere → organic carbon in plants
A major source of minerals in the soil is the
parent rock from which soil is formed
plants
animals
bacteria
Total earth’s surface covered by water is
75%
60%
85%
50%
The biotic component of the biosphere is not constituted by
producers
consumers
decomposer
air
An increase in carbon dioxide content in the atmosphere would not cause
more heat to be retained by the environment
increase in photosynthesis in plants
global warming
the abundance of desert plants
Oxygen is returned to the atmosphere mainly by
burning of fossil fuel
respiration
photosynthesis
fungi
Low visibility during cold weather is due to
formation of fossil fuel
unburnt carbon particles or hydrocarbons suspended in the air
lack of adequate power supply
none of these
The growth of Lichens on barren rocks is followed by the growth of
moss
ferns
gymnosperms
algae
Marked temperature changes in the aquatic environment can affect
breeding of animals
more growth of aquatic plants
process of digestion in animals
availability of nutrients.
Soil erosion can be prevented by
raising forests
deforestation
excessive use of fertilizer
overgrazing by animals
What happens when rain falls on soil without vegetational cover?
Rainwater percolates in soil efficiently
Rainwater causes loss of surface soil
Rainwater leads to the fertility of the soil
Rainwater does not cause any change in soil
NCERT Exemplar solutions for Science [English] Class 9 14 Natural Resources Short Answer Questions [Pages 83 - 84]
Rivers from land, add minerals to seawater. Discuss how?
How can we prevent the loss of topsoil?
How is the life of organisms living in water affected when water gets polluted?
During summer, if you go near the lake, you feel relief from the heat, why?
In the coastal areas, wind current moves from the sea towards the land during the day; but during the night it moves from land to the sea. Discuss the reason.
Following are a few organisms
(a) lichen (b) mosses (c) mango tree (d) cactus Which among the above can grow on stones; and also help in the formation of soil? Write the mode of their action for making soil.
Soil formation is done by both abiotic and biotic factors. List the names of these factors by classifying them as abiotic and biotic?
All the living organisms are basically made up of C, N, S, P, H and O. How do they enter the living forms? Discuss.
Why does the percentage of gases like oxygen, nitrogen and carbon dioxide remain almost the same in the atmosphere?
Why does the moon have very cold and very hot temperature variations eg, from −190°C to 110°C even though it is at the same distance from the sun as the earth is?
Why do people love to fly kites near the seashore?
Why does the Mathura refinery pose problems to the Taj Mahal?
Why do not lichens occur in Delhi whereas they commonly grow in Manali or Darjeeling?
Why does water need conservation even though large oceans surround the landmasses?
There is mass mortality of fishes in a pond. What may be the reasons?
Lichens are called pioneer colonisers of bare rock. How can they help in the formation of soil?
“Soil is formed by water.” If you agree to this statement then give reasons
Fertile soil has lots of humus. Why?
Why step farming is common in hills?
Why are root nodules useful for plants?
NCERT Exemplar solutions for Science [English] Class 9 14 Natural Resources Long Answer Questions [Page 84]
How do fossil fuels cause air pollution?
What are the causes of water pollution? Discuss how you can contribute to reducing water pollution.
A motor car, with its glass totally closed, is parked directly under the sun. The inside temperature of the car rises very high. Explain why?
Justify “Dust is a pollutant”?
Explain the role of the Sun in the formation of soil.
Carbon dioxide is necessary for plants. Why do we consider it a pollutant?
Solutions for 14: Natural Resources
NCERT Exemplar solutions for Science [English] Class 9 chapter 14 - Natural Resources
Shaalaa.com has the CBSE Mathematics Science [English] Class 9 CBSE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT Exemplar solutions for Mathematics Science [English] Class 9 CBSE 14 (Natural Resources) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. NCERT Exemplar textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Science [English] Class 9 chapter 14 Natural Resources are Air is a Mixture, Atmosphere and Its Layers, Wind: The Movement of Air, Biogeochemical Cycle, The Carbon Cycle, The Oxygen Cycle, Ozone Layer Depletion, Water Pollution and Its Causes, Biosphere: The Domain of Life, Rain, Water: Our Lifeline, Where Do We Get Water From?, Importance of Water, Water Cycle, Nitrogen Cycle, Availability of Water, Mineral Riches in the Soil, Ozone, Natural Resources.
Using NCERT Exemplar Science [English] Class 9 solutions Natural Resources exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in NCERT Exemplar Solutions are essential questions that can be asked in the final exam. Maximum CBSE Science [English] Class 9 students prefer NCERT Exemplar Textbook Solutions to score more in exams.
Get the free view of Chapter 14, Natural Resources Science [English] Class 9 additional questions for Mathematics Science [English] Class 9 CBSE, and you can use Shaalaa.com to keep it handy for your exam preparation.
