The ozone layer is present about 30 miles (50 Km) in atmosphere above the Earth. The stratum (layer) of atmosphere in which ozone layer lies is called as:

(A) Exosphere
(B) Mesosphere
(C) Stratosphere
(D) Ionosphere

Q. The stratosphere layer is the second major layer of Earth’s atmosphere, just above the layer:
(A) Troposphere
(B) Mesosphere
(C) Ionosphere
(D) Exosphere

Q. The Mesosphere is the third major layer of the Earth’s atmosphere, directly above the:
(A) Exosphere
(B) Mesosphere
(C) Ionosphere
(D) Stratosphere

Answers:
1. (C) Stratosphere
2. (A) Troposphere
3. (D) Stratosphere