Fri. Jan 10th, 2025

Climatic Change

  1. How does a greenhouse keep the inside warmer than the outside environment?

    Options:
    1. By reflecting solar radiation back to space
    2. By absorbing infrared radiation from the earth’s surface
    3. By allowing shortwave incoming solar radiation to come in
    4. By allowing longwave outgoing terrestrial radiation to escape

    Option: B

  2. What is the most significant greenhouse gas?

    Options:
    1. Water vapor
    2. Oxygen
    3. Carbon dioxide
    4. Nitrogen

    Option: C

  3. What is the pre-industrial level of atmospheric carbon dioxide?

    Options:
    1. 180-190 ppmv
    2. 280-290 ppmv
    3. 380-390 ppmv
    4. 480-490 ppmv

    Option: B

  4. What are the major sinks of atmospheric carbon dioxide?

    Options:
    1. Coal mines and oil rigs
    2. Oceans and vegetation covers
    3. Factories and power plants
    4. Cars and trucks

    Option: B

  5. What is the overall increase in atmospheric carbon dioxide from the pre-industrial level to 1998?

    Options:
    1. 10%
    2. 15%
    3. 20%
    4. 25%

    Option: D

  6. What is the prediction of the Schneider Model regarding the temperature increase from doubled atmospheric carbon dioxide?

    Options:
    1. 0.5°C-1.0°C
    2. 1.5°C-3.0°C
    3. 3.5°C-5.0°C
    4. 5.5°C-7.0°C

    Option: B

  7. What is the feedback mechanism predicted by the Schneider Model?

    Options:
    1. Increased evaporation and cloudiness
    2. Decreased albedo and more solar radiation reaching the earth’s surface
    3. Increased absorption of infrared radiation by the atmosphere
    4. Decreased activity of hydrological cycle

    Option: A

  8. What is the prediction of the General Circulation Model regarding the temperature increase from doubled atmospheric carbon dioxide?

    Options:
    1. 1.0°C-1.5°C
    2. 2.0°C-2.5°C
    3. 2.5°C-3.0°C
    4. 2.9°C

    Option: D

  9. According to S.H. Shneider, what would be the effect of increased atmospheric carbon dioxide on cloudiness?

    Options:
    1. Increased cloudiness
    2. Decreased cloudiness
    3. No change in cloudiness
    4. Cannot be determined

    Option: C

  10. What is the estimated range of increase in average surface air temperature at the global level by the end of the 21st century as per the IPCC report of 2001?

    Options:
    1. 0.5°C to 0.7°C
    2. 1°C to 5.8°C
    3. 0.4°C
    4. 0.6°C

    Option: B

  11. What is the estimated increase in surface temperature over the past one hundred years up to 2000 ?

    Options:
    1. 0.5°C to 0.7°C
    2. 1°C to 5.8°C
    3. 0.4°C
    4. 0.6°C

    Option: A

  12. According to the passage, what might have caused a reduction in air temperature in the northern hemisphere between 1940 and 1970?

    Options:
    1. Increased concentration of atmospheric carbon dioxide
    2. Increased consumption of fossil fuels
    3. Large amounts of volcanic dust
    4. Direct impact of the greenhouse effect

    Option: C

  13. What is the positive effect of increased greenhouse effect due to increased concentration of carbon dioxide in the atmosphere?

    Options:
    1. Decreased precipitation
    2. Increased cloudiness
    3. Increased air temperature
    4. Decreased soil moisture content

    Option: C

  14. According to Pittock (1972), what would be the effect of a change in global mean temperature by a few degrees Celsius caused by the greenhouse effect?

    Options:
    1. No effect on climate
    2. A moderate change in climate
    3. A great change in climate
    4. Cannot be determined

    Option: C

  15. What would be the effect of increased temperature due to increased greenhouse effect on precipitation and soil moisture content?

    Options:
    1. Increased precipitation and soil moisture content
    2. Decreased precipitation and soil moisture content
    3. No change in precipitation and soil moisture content
    4. Cannot be determined

    Option: B

  16. Which theory validates the concept of continental drift?

    Options:
    1. Seafloor spreading
    2. Paleomagnetism
    3. Plate tectonics
    4. Geophysical research

    Option: C

  17. What are the major implications of the plate tectonic theory?

    Options:
    1. Origin of oceans
    2. Origin of mountains
    3. Continental drift
    4. All of the above

    Option: D

  18. What causes the clustering or scattering of continental masses?

    Options:
    1. Ocean currents
    2. Plate boundaries
    3. Polar location of continents
    4. Seafloor spreading

    Option: C

  19. What is the primary requirement for the formation of great ice caps?

    Options:
    1. Plate boundaries
    2. Seafloor spreading
    3. Continental drift
    4. Polar location of continents

    Option: D

  20. When were all the landmasses united in one landmass named Pangaea II?

    Options:
    1. 350-250 million years BP
    2. 180 million years BP
    3. 70-100 million years BP
    4. 1 million years BP

    Option: A