Environmental Studies MCQ Questions and Answers for Practice

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