Environmental Science - Study Mode

[#616] What is the only continent on earth where Giraffes live in the wild?
Correct Answer

(A) Africa

Explanation

Solution: Africa is the only continent where Giraffes live the wild.

[#617] Grassland of USA is referred to as
Correct Answer

(A) Prairies

Explanation

Solution: In the U.S., Grassland is referred as prairies. In South America, it is referred as pampas. In Central Eurasian, it is referred as steppes. In Africa, it is referred as savannas.

[#618] Which of the following is mainly responsible for the extinction of wild life
Correct Answer

(D) All of these

Explanation

Solution: All of these.

[#619] The percentage of water vapour present in the air compared to that required for saturation is the:
Correct Answer

(D) Relative humidity

Explanation

Solution: Air with a 50 percent relative humidity actually contains one-half the amount of water vapor required for saturation. Air with a 100 percent relative humidity is said to be saturated because it is filled to capacity with water vapour.

[#620] Major cause of Ozone depletion is due to which chemical?
Correct Answer

(A) ChloroFluoroCarbons

Explanation

Solution: Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).