PDF chapter test TRY NOW

Why is atmosphere essential for life on earth?
 
The atmosphere is the huge  that covers the earth and extends more than  above the earth's surface.
 
This layer is essential for life on our planet as it provides us with  to breathe.
 
The atmosphere helps to maintain the of the Earth constant during the day. It also escaping from the surface of the Earth into space during night.
 
Role of atmosphere in sustaining life on Earth:
 
The is the first layer of the atmosphere where we live.
 
This layer is responsible for the on earth.
 
The  is the second layer of the atmosphere.
 
The is present to protect the life on earth from the . This layer acts like a of the earth.
 
The  is the third layer, where that enter gets vaporized in this layer.
 
The fourth layer of the atmosphere is known as the .
 
 orbits in this layer. are natural lights occur in this region due to the ions present in that layer.
 
is a part of the  where the high energy radiations from the Sun collide with the gas molecules and make the .
 
These electrically charged particles create . Transmission of is possible due to the ions present in this region.