biology - natural resources

Class 9 - Biology

Natural Resources

MCQ
Q&A
Question:
Fill In the Blanks :
An increase in the average temperature of the earth's atmosphere, brought about by the enhanced greenhouse effect. ________
Answer:

Global Warming

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Questions and Answers


Natural Resources - Questions
1. Fill In the Blanks :
On planets like Venus and Mars the major component of the atmosphere is ___________.
Answer
2. Fill In the Blanks :
The fossil fuels like coal and petroleum contain small amounts of __________ and __________ which are primarily responsible for acid rain.
Answer
3. Fill In the Blanks :
The region which includes all the earth's liquid water, frozen water and small amounts of water vapor in the earth's atmosphere. ________
Answer
4. Fill In the Blanks :
Soil contains bits of decayed living organisms which is called ________ ?
Answer
5. Name two diseases caused due to an increased content of pollutants in the air produced due to the burning of fossil fuels.
Answer
6. Fill In the Blanks :
The space among the soil particles are filled with ________.
Answer
7. Fill In the Blanks :
Water covers _____% of the Earth's surface.
Answer
8. Fill In the Blanks :
The substances that cause pollution are called ___________.
Answer
9. Fill In the Blanks :
________ is formed due to condensation of water vapours in the lower region of atmosphere.
Answer
10. Fill In the Blanks :
The mass of air surrounding the Earth. ________
Answer
11. Fill In the Blanks :
Control of water and electrolyte balance in the body. ________
Answer
12. Fill In the Blanks :
An increase in the average temperature of the earth's atmosphere, brought about by the enhanced greenhouse effect. ________
Answer
13. Fill In the Blanks :
An increase in the content of these harmful substances in air is called ________ ?
Answer
14. Fill In the Blanks :
Specific Organisms  are found to be very sensitive to the levels of contaminants like sulphur dioxide in the air. What are these organisms called ________?
Answer
15. Fill In the Blanks :
The life-supporting zone of the Earth where the atmosphere, the hydrosphere and the lithosphere interact and make life possible, is known as the ____________.
Answer
16. Fill In the Blanks :
_________ is the region of atmosphere where ozone layer is present.
Answer
17. Fill In the Blanks :
__________ is a major factor in deciding the soil structure because it causes the soil to become more porous and allows water and air to penetrate deep underground.
Answer
18. Fill In the Blanks :
The eggs and larvae of various aquatic animals are particularly susceptible to _____________ changes.
Answer
19. Fill In the Blanks :
The life-supporting zone of the Earth where the atmosphere, hydrosphere and lithosphere interact and make life possible. ________
Answer
20. Fill In the Blanks :
In the upper layer of the atmosphere, a molecule containing three atoms of oxygen is found. It is called ________.
Answer
21. What is hydrosphere?
Answer
22. Give an example of fungi which are known as 'indicator of air pollution'.
Answer
23. Why do organisms need water?
Answer
24. Why is water essential for life?
Answer
25. Fill In the Blanks :
Green plants convert carbon dioxide into glucose in the presence of ______________.
Answer
26. Fill In the Blanks :
Ozone hole was first detected over ____________.
Answer
27. Fill In the Blanks :
The living components of the environment. ________
Answer
28. Fill In the Blanks :
An increase in the percentage of such gases in the atmosphere would cause the average temperatures to increase world-wide and this is called ________?
Answer
29. Which gets heated faster land or water?
Answer
30. Define air-pollution?
Answer
31. List any three human activities that you think would lead to air pollution.
Answer
32. What is meant by depletion of ozone layer? Mention one important feature of ozone in atmosphere. Identify the factors responsible for the formation of ozone hole.
Answer
33. Fill In the Blanks :
The cyclic transformation of chemicals through interacting biological, geological and chemical processes that causes transfer of energy and matter amid the various components of the biosphere, leading to a balance between them. ________
Answer
34. Fill In the Blanks :
A process in which anaerobic bacteria convert nitrate ions into nitrogen gas. ________
Answer
35. What is atmosphere?
Answer
36. List the four zones of the atmosphere.
Answer
37. What causes winds?
Answer
38. In which regions is soil erosion very difficult to revert?
Answer
39. What is lithosphere?
Answer
40.

What is biosphere?


Answer
41. How is our atmosphere different from the atmosphere on Venus and Mars?
Answer
42. How do fossil fuel cause air pollution?
Answer
43. Fill In the Blanks :
The outer crust of the Earth. ________
Answer
44. What is smog?
Answer
45. Water is known as "A Wonder Liquid". Justify this statement by giving any two reasons.
Answer
46. Fill In the Blanks :
Hot air is ___________ than cold air.
Answer
47. Fill In the Blanks :
Dead remains of plants and animals is called __________.
Answer
48. Fill In the Blanks :
The non-living components of the environment. ________
Answer
49. What are the effects of acid rain?
Answer
50.

How are clouds formed?


Answer
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