Environmental Studies MCQs Quiz Multiple Choice Questions & Answers

1. Lowest layer of atmosphere is called

1. Thermosphere
2. Stratosphere
3. Troposphere
4. Mesosphere

2. Major cause of increment in population growth

1. decrease in birth rate
2. decrease in mortality rate
3. illiteracy
4. none of the above

3. Most stable ecosystem is

1. Forest
2. Desert
3. Ocean
4. Mountain

4. Nitrogen gets oxidized into

1. Nitrates and ammonia
2. Ammonia and urea
3. Urea and nitrite
4. Nitrates and nitrites

5. Noise is measured using sound meter and the unit is

1. Hertz
2. Decibel
3. Joule
4. Sound

6. Nutrients are recycled in ecosystem by

1. Biogeochemical cycle
2. Energy flow
3. Producers
4. Consumers

7. Region where fresh water meets salt water is called

1. Sea
2. Lake
3. River
4. Estuarine

8. Sequence of eating and being eaten in a ecosystem is called

1. Food web
2. Natural cycle
3. Ecological Pyramid
4. Food chain

9. Study of trends in human population growth and prediction of future growth is called

1. Demography
2. Biography
3. paleography
4. psychology

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

1. Oxygen
2. Hydrogen
3. Nitrogen
4. Carbon dioxide

11. The drop in air temperature at a rate of 6.50 C per 1000 m increase in altitude of troposphere is known as

1. Environmental lapse rate
2. Environmental degradation
3. Green house effect
4. Global warming

12. The ecological pyramid always starts with the following at the base

1. Decomposer
2. Producer
3. Consumer
4. None of these

13. The Ecological pyramid that is always upright

1. Pyramid of energy
2. Pyramid of biomass
3. Pyramid of number
4. None of these

14. The flow of energy is

1. Oneway
2. Cyclic
3. Linear and oneway
4. None of these

15. The green plants are also called

1. Producers
2. Consumers
3. Reducers
4. Detritivores

16. The layer of atmosphere containing much of ozone gas is

1. Thermosphere
2. Stratosphere
3. Troposphere
4. Troposphere

17. The layer which provides ideal site for flying of jet planes is

1. Thermosphere
2. Stratosphere
3. Mesosphere
4. Troposphere

18. The layers of atmosphere consists of

1. Troposphere, Stratosphere, Mesosphere and Temperature
2. Hydrosphere and biosphere
3. Lithosphere and Hydrosphere
4. Biosphere and Hydrosphere

19. The loss of water from plants and tree leaves is called

1. Precipitation
2. Respiration
3. Evaporation
4. Transpiration

20. The main components of photochemical smog is

1. water vapour
2. sulphur dioxide
3. oxides of nitrogen
4. all of the above

21. The most important organisms of an ecosystem are

1. Herbivores
2. Producers
3. Carnivores
4. Protozon

22. The subsurface sources of water is

1. River
2. Dug well
3. Stream
4. Ocean

23. The sudden increase in the population of the species is

1. population growth
2. population explosion
3. over population
4. all above

24. The TAJ MAHAL at AGRA may be damaged by

1. sulphur dioxide
2. chlorine
3. hydrogen
4. oxygen

25. The term Environment is derived from an old French word enviro means

1. Outside
2. Surroundings
3. Inside
4. Biotic community

26. The three major living components of an ecosystem are

1. Producers, consumers and Decomposers
2. Producers, Autotrophs and Decomposers
3. Heterotrophs, Consumers and Reducers
4. Detritivores, Consumers and Phototrophs

27. Which of the following is not a method of water conservation

1. rain water harvesting
2. ground water extraction
3. improving irrigation efficiency
4. avoiding water wastage

28. Which of the following statement about the forest is not correct

1. Forest reduces soil erosion
2. Provides recreational opportunities
3. Provides economic development
4. None of the above

29. Word oikos means.............and logos means..............

1. Houses and study of
2. Study and houses
3. Only houses
4. Study of people

30. Zone consisting air, water and soil is known as

1. Hydrosphere
2. Atmosphere
3. Lithosphere
4. Biosphere

31. 21st March is observed as

1. World forest day
2. World environment day
3. World wildlife day
4. World population day

32. 71% of earth surface is covered with:

1. land
2. air
3. water
4. coal

33. According to Thomas Malthus human population increase in

1. arithmetic ratio
2. geometric ratio
3. exponension ratio
4. all above

34. Afforestation is necessary for

1. Soil conservation
2. Soil erosion
3. Well control
4. Low humidity

35. Air pollution is caused by

1. Insecticides
2. Sewage
3. Smoke
4. Loud speakers

36. Atmosphere may extents to a height of about following kms above the earth surface

1. 80 km
2. 8000 km
3. 800 km
4. 8 km

37. Atomospheric ozone layer which protect us from UV-B & C is getting depleted most by addition of

1. Chloro flurocarbon
2. Carbon monooxide
3. Carbon dioxide
4. Sulpur dioxide

38. Chipko movement was started to conserve

1. Forests
2. Grasslands
3. Deserts
4. Soil

39. Consumers are also called

1. Photoautotrophs
2. Saprotrophs
3. Heterotrophs
4. Reducers

40. Conversion of ammonia to nitrite and then nitrate is called

1. Nitrogen fixation
2. De nitrification
3. Nitrification
4. Ammonification

41. Deforestation generally decreases

1. Rainfall
2. Soil erosion
3. Draught
4. Global warming

42. Detritus food chain starts from

1. Green plants
2. Grass
3. Dead organic matter
4. Phytoplankton

43. Earthworms and bacteria are called

1. Producers
2. Consumers
3. Decomposers
4. None of these

44. 5th June is observed as

1. World forest day
2. World environment day
3. World wildlife day
4. World population day

45. Eutrophication means

1. thermal change in water
2. filling up of water body with aquatic due to extra nourishment
3. solid waste
4. none of the above

46. Example of omnivores is

1. Lion
2. Hawk
3. Human
4. Snake

47. Food chain always starts with

1. Respiration
2. Transpiration
3. Nitrogen fixation
4. Photosynthesis

48. Formation of ozone is

1. oxidation reaction
2. oxidation reaction
3. photochemical reaction
4. photochemical reaction

49. Hydrosphere includes

1. Animals
2. Soil
3. Plants
4. Water bodies

50. Important abiotic factors in ecosystems include which of the following?

1. temperature
2. water
3. wind
4. all of the above