what are the function and parts of the atmosphere?

Expert Answers
garthman99 eNotes educator| Certified Educator


The atmosphere is made up of 4 layers.

The lowest layer or the layer right above us is the troposphere. It is the zone of weather and where the clouds are formed. The temperature decreases with altitude here. At the top of the troposphere is the tropopause where the jet stream is found: this contains strong winds that blow eastwards.

The next layer is the stratosphere which contains the ozone layer responsible for protecting us from the sun’s harmful ultraviolet radiation. The temperature increases with altitude in this layer.

In the mesosphere the temperature is decreasing with altitude. It is the coldest layer of the atmosphere and it protects us from meteoroids.

The outermost layer is the thermosphere; it is the hottest layer because UV radiation is turned into heat and is made up of two layers the ionosphere- used for radio communication- and the exosphere where satellites orbit the earth