Air - part 1 - 5th class

Air

Layers of Atmosphere

Troposphere: 0 to 12 km - This is where weather conditions occur. 

Stratosphere: 12 to 50 km - The lower part of the stratosphere contains the ozone layer.

Mesosphere: 50 to 80 km - This is the coldest region of the atmosphere.

Thermosphere: 80 km and  above - The temperature is very high in this layer.

                           This layer includes Ionosphere & Exosphere. 

Ionosphere : It is the lower part of the thermosphere. Radio waves are reflected 

                      back to the earth from this layer. This helps in radio communication.

Exosphere: It is the upper part of the thermosphere. Air is very thin here.

                    This is the area where satellites orbit the earth.