The ‘Earth summit’ was held at:

Related Mcqs:

1. If there were no CO2 in the earth’s atmosphere, the temperature of earth’s surface would have been:

   A. same as present
   B. Less than the present
   C. Higher than the present
   D. Dependent on the amount of O2 in the atmosphere

2. Geology is the study of earth. Earth’s crust is divided into:

   A. Ocean
   B. Continents
   C. Both (a) & (b)
   D. None of these

3. What immediate hazard is likely to occur if the temperature of the earth rises by 5?C?

   A. Melting of polar ice
   B. Destruction of phytoplanktons
   C. Inundation of coastal towns
   D. Increase in productivity

4. The presence of O3 in atmosphere of earth:

   A. Has been responsible for increasing the average global temperature in recent
   B. Is advantageous since it supplies O2 for people travelling in jets
   C. Hinders higher rate of photosynthesis
   D. Helps in checking the penetration of ultra violet rays to earth

5. Most outstanding danger at present for the survival of living beings on earth is:

   A. Radiation hazard
   B. Desertification
   C. Deforestation
   D. Gleization

6. Heating of earth surface is due to:

   A. Air pollution
   B. Water pollution
   C. Soil pollution
   D. All of these

7. The part of earth in which life exists is known as:

   A. Lithosphere
   B. Biosphere
   C. Atmosphere
   D. Hydrosphere

8. The processes involving the transformation of carbon compounds on earth include:

   A. Only the plants
   B. Both biological and non-biological processes
   C. Only the living organisms
   D. Only the animals

9. The soil cover of the earth lies between:

   A. Atmosphere and lithosphere
   B. Lithosphere and biosphere
   C. Atmosphere and hydrosphere
   D. All of these

10. A part of the rock forming material of the earth comprises:

    A. Oxides of Ca and Na
    B. Oxides of Ca and K
    C. Aluminosilicates of Na, K and Ca
    D. Nitrates of Fe and Al