Mesosphere

Q.

1. A, B, C and D are four layers of atmosphere. A helps in long-distance radio communications. In layer B, most of the weather phenomena take place. The pollutants released from air conditioners and aerosols deplete layer D which also gets depleted by nitrous oxide. Meteorites burn up in layer C. Identify the layers A, B, C and D and arrange them in an increasing order of height from the surface of the earth.

Q. The temperature of _______ increases upto 1200°C.

1. thermosphere
2. mesosphere
3. stratosphere
4. troposphere