Draw a self-explanatory diagram illustrating the structure of the atmosphere.

The proportion of Nitrogen in the atmosphere is about

1. 80%
2. 21%
3. 78%
4. 65%

In which of the following layers in atmosphere, Normal lapse rate of temperature is observed?

1. Stratosphere
2. Troposphere
3. Ionosphere
4. Exosphere

Which of the following layers of atmosphere absorbs the ultra violet rays of Sun?

1. Ozonosphere
2. Troposphere
3. Ionosphere
4. Exosphere