Give reasons for the following:

Ionosphere is important in long distance radio-wave communication.

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

Which of the following is the lower most layer of the atmosphere?

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

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

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