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Air: Composition and Structure
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In this lesson I have discussed about the composition of atmosphere and deatils about it's structure comprising of different layers.

Arpita Prakash
NCERTs series initiator at Unacademy 'Educator of the Month' for Feb'19 CBSE 0.1% Merit Certificate holder in Mathematics

Unacademy user
Thank u sir...for ur efforts
Ma'am I never had interest in geography....Infact I always hated ur teaching style has created so much of my interest in geography that I know find it as the most interesting subject.....thanks for sharing ur knowledge through unacedemy....uh be a great mentor..
Arpita Prakash
2 years ago
thankyou so much :)
awesome lesson.... thanks a lot. Mam, one doubt,, what happen to temp of exosphere with increase in height
Bhupesh Bisen
2 years ago
bro in exosphe​re the temperature is vary in day and night day there is very hot and in night the temperature is very low ... though in the exosphere there is almost vaccum we cannot feel any kind of temperature because the temperature is kinetic energy stored by the air particles.
Bhupesh Bisen
2 years ago
as there is less air particle and hence the collision is also less and heat energy is not come out .. hence we can say that as pressure decrease the temperature is also decreases.
Hi Ma'am . Thank you for such awesome courses. I have a doubt...according to slide 20,lesson,class 6 summary,meteor are the shooting stars,they burn up.On the the other hand,meteorite are the ones falling on earth's surface. In this lesson,it is said that meteorites burn up in mesosphere while entering earth's atmosphere. Is it so that meteorites also get burn up before falling on earth's surface ?? Please clarify :)
Jeet 007
3 years ago
See the basic difference between a meteor and a meteorite is regarding whether or not it reaches the earth's surface. Meteors are those falling craters that FAIL to reach the earth surface which means they COMPLETELY burn out in the atmosphere. On the other hand, meteorites are those that SUCCEED in hitting the earth's surface which means that they are NOT burnt out completely (although friction with the atmosphere causes burning and weathering of the materials). I hope this clarifies your doubt.
Malyaj Singh
3 years ago
Thanks man ! (y)
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