AIR
1. What is a resource?
2. What are natural resources? Give few examples.
3. What is atmosphere?
4. What would happen if there is no air on earth?
5. Explain various layers of atmosphere. How do various layers differ from each other?
6. What is ozone layer? Where is it present? What is its importance?
7. What is air? Give its main characteristics.
8. Give the composition of air.
9. What is the role of atmosphere to maintain the sanctity of ‘mother nature’ towards us?
10. What is wind? What causes the formation of winds?
11. Explain various factors which affect the wind movement.
12. Explain various effects of wind on our surroundings.
13. What are the effects of wind on plants?
14. What leads to the formation of rains?
15. How do dust particles help in precipitation in the form of rainfall or snowfall?
16. In what ways precipitation can occur?
WATER
17. What are the various sources of water on earth?
18. Enlist the main characteristics of water.
19. What are the two main types of water resources?
20. What are fresh water resources?
21. What role does fresh water play in the biosphere?
22. What do you mean by ocean resources?
23. Enlist various uses of ocean resources to us.
MINERAL RICHES IN THE SOIL
24. What is soil? Where is it present?
25. How is soil formed? What are the factors responsible for the formation of soil?
26. What is meant by weathering of rocks? How this process helps in the formation of soil?
27. What is biological weathering? What is its importance in the formation of soil?
28. What is meant by mineral riches of soil?
29. What are the five general types of mineral matter present in soil?
30. Name the 3 main types of soil.
31. Differentiate between the three types of soil on the basis of their composition and functions.
32. What do you understand by soil profile?
33. Describe various soil horizons in a soil profile.
34. Which soil horizon contains clay particles and various minerals?
35. Name the soil horizon which contains bed rocks.
36. What is humus? How is it formed?
37. What is the importance of humus in the growth of plants?
38. Explain the role of soil in the life of human beings citing various examples.
AIR, WATER AND SOIL POLLUTION
39. What is pollution? What are the various factors which lead to air pollution?
40. Name the harmful gases present in our atmosphere. How do they cause harm to our atmosphere?
41. What is acid rain? How is it formed? What are its harmful effects?
42. How does industrialization lead to air pollution?
43. Name various pollutants emitted by the exhausts of automobiles.
43. How can we prevent the amount of pollution caused by automobile exhaust?
44. How do chemical fertilizers and pesticides sprayed on the field crops lead to water and soil pollution?
45. Name the salts mainly present in the fertilizers which cause deterioration of water quality in ponds and
rivers.
46. How is acid rain responsible for soil pollution?
BIOGEOCHEMICAL CYCL ES
47. What are biogeochemical cycles?
48. What is the importance of biochemical cycles in nature?
49. Explain the carbon–cycle in nature with an illustration.
50. Enlist various processes which remove CO
from the atmosphere.
51. Define ammonification and nitrification.
52. Draw and explain nitrogen cycle in nature.
53. Explain the two types of bacteria involved in nitrogen cycle.
54. How do industries help in N
fixation?
55. What role do plants play in N
fixation in nature?
56. What are the compound forms of nitrogen present in our atmosphere?
57. Illustrate the oxygen cycle in nature given various processes which help in adding and removing oxygen
from the atmosphere.
58. Explain the hydrological cycle in nature with an illustration.
59. Define transpiration. What is the role of this process in water cycle?
60. What is the importance of water cycle in nature?
61. Name various processes which help in
(a) adding
(b) removing water from the atmosphere.
GREENHOUSE EFFECT AND OZONE LAYER
62. Define Greenhouse effect. Explain various factors which contribute to this effect.
63. What would happen if the concentration of CO
gas would increase in our atmosphere?
64. What cause depletion of ozone layer? What are the harmful effects of depletion of ozone layer over our
atmosphere?
65. What are aerosols? How do they damage the ozone layer?
66. Which component of sun’s rays is shielded by the ozone layer? What would happen if that component
reaches the earth’s surface?
67. What do you mean by
(a) Conservation of natural resources?
(b) Ecological crises?
1. What is a resource?
2. What are natural resources? Give few examples.
3. What is atmosphere?
4. What would happen if there is no air on earth?
5. Explain various layers of atmosphere. How do various layers differ from each other?
6. What is ozone layer? Where is it present? What is its importance?
7. What is air? Give its main characteristics.
8. Give the composition of air.
9. What is the role of atmosphere to maintain the sanctity of ‘mother nature’ towards us?
10. What is wind? What causes the formation of winds?
11. Explain various factors which affect the wind movement.
12. Explain various effects of wind on our surroundings.
13. What are the effects of wind on plants?
14. What leads to the formation of rains?
15. How do dust particles help in precipitation in the form of rainfall or snowfall?
16. In what ways precipitation can occur?
WATER
17. What are the various sources of water on earth?
18. Enlist the main characteristics of water.
19. What are the two main types of water resources?
20. What are fresh water resources?
21. What role does fresh water play in the biosphere?
22. What do you mean by ocean resources?
23. Enlist various uses of ocean resources to us.
MINERAL RICHES IN THE SOIL
24. What is soil? Where is it present?
25. How is soil formed? What are the factors responsible for the formation of soil?
26. What is meant by weathering of rocks? How this process helps in the formation of soil?
27. What is biological weathering? What is its importance in the formation of soil?
28. What is meant by mineral riches of soil?
29. What are the five general types of mineral matter present in soil?
30. Name the 3 main types of soil.
31. Differentiate between the three types of soil on the basis of their composition and functions.
32. What do you understand by soil profile?
33. Describe various soil horizons in a soil profile.
34. Which soil horizon contains clay particles and various minerals?
35. Name the soil horizon which contains bed rocks.
36. What is humus? How is it formed?
37. What is the importance of humus in the growth of plants?
38. Explain the role of soil in the life of human beings citing various examples.
AIR, WATER AND SOIL POLLUTION
39. What is pollution? What are the various factors which lead to air pollution?
40. Name the harmful gases present in our atmosphere. How do they cause harm to our atmosphere?
41. What is acid rain? How is it formed? What are its harmful effects?
42. How does industrialization lead to air pollution?
43. Name various pollutants emitted by the exhausts of automobiles.
43. How can we prevent the amount of pollution caused by automobile exhaust?
44. How do chemical fertilizers and pesticides sprayed on the field crops lead to water and soil pollution?
45. Name the salts mainly present in the fertilizers which cause deterioration of water quality in ponds and
rivers.
46. How is acid rain responsible for soil pollution?
BIOGEOCHEMICAL CYCL ES
47. What are biogeochemical cycles?
48. What is the importance of biochemical cycles in nature?
49. Explain the carbon–cycle in nature with an illustration.
50. Enlist various processes which remove CO
from the atmosphere.
51. Define ammonification and nitrification.
52. Draw and explain nitrogen cycle in nature.
53. Explain the two types of bacteria involved in nitrogen cycle.
54. How do industries help in N
fixation?
55. What role do plants play in N
fixation in nature?
56. What are the compound forms of nitrogen present in our atmosphere?
57. Illustrate the oxygen cycle in nature given various processes which help in adding and removing oxygen
from the atmosphere.
58. Explain the hydrological cycle in nature with an illustration.
59. Define transpiration. What is the role of this process in water cycle?
60. What is the importance of water cycle in nature?
61. Name various processes which help in
(a) adding
(b) removing water from the atmosphere.
GREENHOUSE EFFECT AND OZONE LAYER
62. Define Greenhouse effect. Explain various factors which contribute to this effect.
63. What would happen if the concentration of CO
gas would increase in our atmosphere?
64. What cause depletion of ozone layer? What are the harmful effects of depletion of ozone layer over our
atmosphere?
65. What are aerosols? How do they damage the ozone layer?
66. Which component of sun’s rays is shielded by the ozone layer? What would happen if that component
reaches the earth’s surface?
67. What do you mean by
(a) Conservation of natural resources?
(b) Ecological crises?
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