2nd Year Biology Chapter 27 Man and his Environments Notes MCQs

biology 12th notes chapter 27

1. The three primary soil macronutrients are


2. The Nuclear Power Station can last only for about:


3. What proportion of UV radiation from the sun normally absorbed by the atmospheric layer of ozone?


4. The global human population grew very slowly until


5. Which one of the following pair is a renewable resource?


6. Our daily energy requirement met by fossil fuels is:


7. The concentration of which gas is highest in our environment?


8. Which of the followings is non-biodegradable?


9. What is the primary cause of species extinction today?


10. Some detergents contain a lot of:


11. The most serious environmental effect posed by hazardous wastes is


12. Ozone molecule is made up by binding of three atoms of:


13. The depletion in the ozone layer is caused by


14. Out of the below listed greenhouse gases, which one is entirely anthropogenic in origin?


15. A single chlorine atom can react with ultraviolet rays and destroy as many as:


16. Study of human populations and things that affect them is called


17. Disease prevention medicine and food hygiene


18. Phosphate


19. The increase in the concentration of CO₂ in our environment in last fifty years is about


20. The destruction of forests leaves the soil barren and this is called:


21. Which of the following substance does not contribute to the greenhouse effect?


22. How the biological oxygen demand gets affected with the increased presence of organic matter in water?


23. Which one of the following non-biodegradable waste can pollute the earth to dangerous levels of toxicity, if not handled properly?


24. Which of the followings is not a major greenhouse gas?


25. The nuclear energy is derived by splitting the nucleus of


26. Air in motion is called:


27. Eutrophication of a lake occurs as a result of


28. The upper weather layer of earth crust is:


29. The lead poisoning damages the human?


30. Non-renewable resources include various metals, non-metallic minerals and


31. Mental illness


32. What is not true about ozone layer?


33. In 1947, at the time of independence the population of Pakistan was


34. Environmental buffer is a:


35. Treasures of all type of resources is


36. The cheapest source of energy is


37. The first stage in demographic transition is


38. Which of the following statements about ozone depletion is not correct?


39. Hydroelectric power is the electric power generated by the energy of


40. Only 30 percent of the earth is:


41. Population growth is an environmental issue because


42. Which of the followings is not an important characteristic of the green revolution?


43. Oxide of nitrogen


44. Taj Mahal


45. Ozone is the upper layer of atmosphere that filters:


46. Which of the following is not considered as part of water use planning?


47. The decline in thickness of ozone layer is caused by increasing level of 


48. The presence of high coliform counts in water indicate


49. Groundwater mining in coastal areas can result into


50. Insecticide


51. Acid rain is formed due to contribution from the following pair of gases


52. The ozone layer has developed a hole over the:


53. In dams, the power used to drive generators to produce electricity is called:


54. Anything in air that may be harmful to living organism is:


55. Hormonal disorder


56. Which of the following results are not affected due to depletion of the stratospheric ozone layer?


57. The earth surface is covered with water about:


58. Model predictions about global climate change indicates that


59. CFCs released from


60. Which of the following countries is the largest source of carbon dioxide emissions from fossil fuel burning?


61. The chemical waste from industry comprises substance called:


62. In order to address the problem of ozone depletion, the United Nations convened a meeting in 1987 in Canada.In that meeting, all the member nations agreed to reduce down the production and use CFC.What was the name of this agreement?


63. A major in-stream use of water is for


64. Which of the followings is not caused by deforestation?


65. Population of Pakistan in the year 1947 was


66. Greenhouse effect


67. The stage in which the biological processes are used to purify water in a wastewater treatment plants is called


68. Which of the followings is the primary cause of acid rain?


69. Among the given choices below, regarding the greenhouse effect which one is having least certainty?


70. Nutrition deficiency


71. The total area of the world under cultivation is


72. A chemical, which kills the weed in a crop is known as


73. Which of the followings is the example of municipal and industrial discharge pipes?


74. Which disease is due to mental illness ?


75. It is fossilized fuel


76. As a result of rising global temperatures following two major impacts are expected


77. The most widely used source of energy on earth is


78. Which substance destroys ozone?


79. The burning of fossil fuel contributes to all of the following except


80. Which of the followings is a prime health risk associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?


81. Oxygen in air


82. Water


83. The increase of environmental temperature due to high amount CO₂ is known as


84. Solving environmental problems is ultimate responsibility of


85. About 95 percent of our daily energy requirement is filled by


86. The steady internal state of homeostasis is known as:


87. Which of the following pollutants causes ozone holes in the ozone layer?


88. What is the harm from the depletion of Earth’s ozone layer?


89. The reason for signing 1987 Montreal Protocol was


90. Which of the followings is not a primary contributor to the greenhouse effect?


91. Less than 1 percent


92. Establishment of new forests, where no forests existed before is called:


93. Which of the following is a renewable resource?


94. Which of the followings has negative effects on the soil and water due to conventional, mechanized farming practices?


95. Methane gas is produced during the scientific processes of


96. Which of the followings is not a major source of groundwater contamination?


97. Water present in the form of frozen ice-Caps is:


98. Which of the followings is not due to global warming?


99. Which of the following environment problems is not caused by human interference in the nitrogen cycle?


100. Soil


101. CFCs are produced by:


102. Diseases in living organisms caused by parasites are called


103. Utilization of water in irrigation is:


104. Which among the followings is not a major use of CFCs?


105. The color of the pure form of ozone is:


106. Lead compound


Short Questions

1. Define biodiversity?
2. Define demography?
3. Define greenhouse effect.
4. Define pollution?
5. Define soil and give its basic constituents. What is soil? What is soil? Give its basic constituents.
6. Define wind?
7. Describe abuses of land.
8. Differentiate between health and disease.
9. Differentiate between insecticide fungicide and herbieide?
10. Differentiate between Population Explosion and Population Pressure. Enlist some reasons of Population Explosion in the world also describe Population Pressure. Write the reasons of world
11. Discuss importance of forests.
12. Enlist some parasitic diseases of man?
13. Explain greenhouse effect?
14. Give at least two ways to conserve energy?
15. Give the names of three human disease which are caused by hormonal disorders?
16. Give two effects of acid rains?
17. Give uses and misuses of agrochemicals.
18. How are tides caused in seas and oceans?
19. How blance in the nutrient cycle can be upset?
20. How do the human beings depend on the environment?
21. How do the ultraviolet rays affect life when more of them reach earth’s surface?
22. How is air important to life as a source?
23. How is electricity generated with the help of wind power?
24. How is nuclear or atomic energy obtained?
25. How much of our daily energy needs are met from the fossil fuels?
26. How nuclear energy is used to generate electricity?
27. Name some important diseases of man caused by nutritional deficiency?
28. Name the gases which are generally found in polluted air?
29. Name the non-renewable (exhaustible) environmental resources which serve as primary sources for the existence of humans.
30. Name two pathogenic and two congenital diseases.
31. Population Explosion. What do you mean by Population Explosion and give its two causes?
32. Quote examples of the global effects of the pollution?
33. Suggest another suitable name for greenhouse effect?
34. What are Air pollutants?
35. What are causes of green house effect?
36. What are causes of tides?
37. What are environmental buffers?
38. What are exhaustible sources of energy?
39. What are Fertilizers?
40. What are inexhaustible resources of energy?
41. What are main sources of water pollution?
42. What are main uses of water?
43. What are pollutants?
44. What are renewable resources?
45. What are solid wastes and how these can be used as source of energy? Give importance of solid waste.
46. What are the environmental problems involved in the use of solid wastes for fuel production?
47. What are the basic constituents of soil?
48. What are the disadvantages of nuclear power?
49. What are the effects of air pollution?
50. What are the effects of global warming?
51. What are the effects of ozone depletion?
52. What are the main sources of water pollution? Give main causes of water pollution.
53. What are the main types of pollution?
54. What are the sources and harmful effects of the air pollutant sulphur dioxide?
55. What do you mean by non- renewable resouces?
56. What do you mean by non-renewable resources? What are renewable resources.Give examples. Differentiate between renewable and non-renewable resources.
57. What is a pesticide?
58. What is a special feature of ozone layer over the Antarctica?
59. What is acid rain?
60. What is air?
61. What is algal bloom?
62. What is composition of air?
63. What is deforestation? What is afforestation? What is reforestation? What is the difference between deforestation and afforestation? Differentiate between afforestation and reforestation. What is the difference among deforestation, afforestation and reforestation?
64. What is difference between deforestation and A-forestation?
65. What is eutrophication?
66. What is geothermal energy? In which form does it come up to earth’s surface?
67. What is hydroelectric power or electricity?
68. What is hydroelectric power?
69. What is nutrient cycle?
70. What is ozone layer?
71. What is Ozone? Give the importance of ozone layer.
72. What is reforestation?
73. What is soil?
74. What is the cause of decline in thickness of ozone layer?
75. What is the composition of the air?
76. What is the important of wild life?
77. What is the main cause of water pollution?
78. What is the maximum age of a nuclear power station?
79. What is the temperature in Oceans?
80. What is tidal power?
81. What is water pollution?
82. What is wild life?
83. What may be the results of increased heating of earth due to greenhouse effect?
84. What measures should be taken for conservation of energy?
85. What percentage of the body weight of animals and plants comprises water?
86. What vital roles do soil play?
87. What was the population of Pakistan at the time of independence in 1947?
88. When did man adopt agriculture?
89. Where in the world is the geothermal energy frequently available?
90. Why coal oil and gas are called fossil fuels?
91. Why tere is a need of protection and conservation of the environment?
92. Why trees are called environmental buffers? Define environmental buffers.
93. Why trees are called environmental buffers?
94. Write down the renewable (inexhaustible) environmental resources which serve as primary sources for the existence of humans.
95. Write names of two degenerative diseases of man?
96. Write names of various types of pollution.
97. Write the causes and effects of ozone depletion? Give the effects of ozone depletion on life.

Long Questions

1. Describe Deforestation and Afforestation and also give importance of forests.
2. Discuss importance of forests.
3. Explain green house and acid rain.
4. Explain the phenomena of Eutrophication.
5. Give uses and misuses of agrochemicals.
6. What are Renewable Resources? Explain any two of them.
7. What is pollution? Explain the phenomenon of air pollution.
8. Write a note on acid rain.
9. Write a note on deforestation and afforestation. Describe deforestation.
10. Write a note on Fossil Fuels.
11. Write a note on greenhouse effect.
12. Write a note on modification of environments.
13. Write a note on ozone layer depletion.
14. Write a note on wild life and fossils fuels.
15. Write a note on wild life? Describe wild life as renewable resources

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