Question

Ozonosphere is a component of
(a) Troposphere
(b) Mesosphere
(c) Stratosphere
(d) Thermosphere

Answer 1

Hint: Second layer of earth’s atmosphere where airplanes fly. It is the layer present between the Troposphere and Mesosphere.

Complete answer:
The Stratosphere is the second layer of the earth’s surface that protects the earth from the harmful gases and radiations from the sun. One of the most important layers that are present in the stratosphere is the ozone layer. This layer in the stratosphere is called the ozonosphere. It protects the earth’s surface from harmful UV rays released by the sun.

Additional information:
- Ozone is one of the trace gases present in the earth’s atmosphere. 3 molecules of ozone are present per 10million molecules in the air.
- It does a very important job i.e., it absorbs radiation from the sun hitting the earth.
- Not entire radiation is absorbed by the ozone because we need some radiation to survive but too much radiation damages living cells.
- Ozone acts as a shield for life on earth.
- Ultraviolet rays that penetrate through the protective layers of skin that damage DNA molecules resulting in sunburns.
- The UVA and UB are the two major types of ultraviolet rays. UV-B radiations are harmful radiations that cause skin cancer and genetic mutations.
- Due to the release of different types of greenhouse gases the ozonosphere layer is getting thinner day by day.
- Chlorofluorocarbons(CFCs) are one of the major causes of the depletion of the ozone layer.
So, the correct answer is ‘Stratosphere’.

Note:
- In 1987, the Montreal Protocol was signed to reduce the release of greenhouse gases that damage the ozone sphere.
- Ozone present in the troposphere is bad ozone that is harmful to plants and animals. The ozone present in the stratosphere is good ozone.