Environmental Science MCQs

Question 1

As the air temperature increases, with no addition of water vapour to the air, the relative humidity will:

Accepted Answer

Increase until it becomes equal to the dew point temperature

Answer

Remain the same

Answer

Increase

Answer

Decrease

Question 2

Green House effect is caused by

Accepted Answer

Increase in CO2

Answer

Increase in O2

Answer

Decrease in O2

Answer

Decrease in CO2

Question 3

If the air temperature remains constant, evaporating water into the air will ____ the dew point and ____ the relative humidity.

Accepted Answer

Increase, increase

Answer

Increase, decrease

Answer

Decrease, increase

Answer

Decrease, decrease

Question 4

If the earth's average surface temperature were to increase, the amount of radiation emitted from the earth's surface would ____, and the wavelength of peak emission would shift toward ____ wavelengths.

Accepted Answer

Increase, shorter

Answer

Increase, longer

Answer

Decrease, shorter

Answer

Decrease, longer

Question 5

The presence of high coliform counts in water indicates

Accepted Answer

contamination by human wastes

Answer

phosphorus contamination

Answer

decreased Biological Oxygen Demand

Answer

hydrocrbon contamination

Question 6

As it travels along the food chain, the concentration of DDT

Accepted Answer

increases

Answer

remains constant

Answer

decreases

Answer

fluctuates randomly

Question 7

Industrial melanism is an example of

Accepted Answer

darkening of skin due to industries

Answer

protective resemblance with the surrounding

Answer

drug resistance

Answer

defensive adaptation of skin against UV radiations

Question 8

Coal is a __________ resource.

Accepted Answer

deforestation

Answer

abiotic

Answer

inorganic

Answer

none of the above

Question 9

Extensive planting of trees to increase forest cover is called

Accepted Answer

Afforestation

Answer

Agroforestry

Answer

Deforestation

Answer

Social forestry