Natural Resources Class 9 Important questions and answers

Given below are the Class 9 Science Important Questions and worksheets for Natural Resources
(a) Multiple choice questions
(b) Fill in the blank's
(c) Very Short Answer type
(d) Short Answer type
(e) Long Answer type

Multiple Choice Questions

Question 1.
Major source of mineral in soil is the
(a) parent rock from which soil is formed
(b) plants
(c) animals
(d) bacteria
Question 2.
Total earth’s surface covered by water is
(a) 75%
(b) 65%
(c) 85%
(d) 51%
Question 3.
Biotic component of biosphere is not constituted by
(a) producers
(b) consumers
(c) decomposer
(d) air
Question 4.
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

Fill in the blanks

Question 5.
(i)The ____, _____ and ____ form the non-living or abiotic component of the biosphere
(ii)Higher concentrations of _____is one of the causes of green house effect/global warming.
(iii)______is the biological process by which water is lost in the form of water vapour from the aerial parts of the plants called stomata.
(iv) _____ gas makes up 78% of our atmosphere

Very Short Answer

Question 6.
Write the name of any two air pollutants?

Question 7.
Name the substance made by nitrogen?

Question 8.
Name the bacteria which help in nitrogen fixation?

Question 9.
Write the process in which O2 is used?

Question 10.
Write the name of greenhouse gases?

Question 11.
Name the substance which damages the ozone layer?

Short Answer type

Question 12.
How is cloud formed?

Question 13.
What is greenhouse effect?

Question 14.
What are biogeochemical cycles?

Question 15.
How is greenhouse effect related to global warming? Explain?
Question 16.
What are the three ways by which CO2 is returned back into atmosphere?

Question 17.
Why does Mathura refinery pose problems to the Taj Mahal?

Question 18.
Write the name of the triatomic molecule of oxygen?
(a)Is its presence necessary in the nature?
(b)How does it affect the environment? Explain?

Question 19.
Suggest any two ways for conservation of water and mention any three traditional methods of doing so?
Question 20.
What is sea breeze and land breeze?

Question 21.
What is eutrophication?

Question 22.
What is soil erosion? How is it prevented?
Question 23.
How is soil formed?
Question 24.
Write the role of lichen, moss, fungi in soil formation?

Question 25.
What is nitrification?
Question 26.
Describe water cycle?
Question 27.
What is biological magnification?
Question 28.
Why nitrogen is essential for us?
Question 29.
What is ozone depletion?

Long answer type

Question 30.
What is meant by air pollution? Explain any two human activities that causes air pollution. Mention any three harmful effects of air pollution?
Question 31.
Mention any three important roles of water essential for the life of organisms on earth’s surface?
Question 32.
How is percentage of carbon dioxide maintained in the atmosphere? Mention one human activity which adds carbon dioxide in the atmosphere?
Question 33.
List three human activities which would lead to an increase in the carbon dioxide content of air?
Question 34.
What is the chemical formula of ozone? What essential function does this gas perform and where it is found? What are CFCs?
Question 35.
Mention three ways by which atmosphere regulates the average temperature on earth?
Question 36.
How are clouds formed? List any three human activities that you think would lead to air pollution and briefly explain each of them?
Question 37.
Write the composition of soil. On what basis is the type of soil decided?
Question 38.
In coastal areas, the wind blows from sea to land during the day. Why?
Question 39.
List three human activities responsible for the pollution of water bodies?
Question 40.
What is soil erosion? Writes its two causes. Which are the three methods of preventing soil erosion?


This Natural Resources Class 9 Important questions and answers is prepared keeping in mind the latest syllabus of CBSE . This has been designed in a way to improve the academic performance of the students. If you find mistakes , please do provide the feedback on the mail.

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