1
The aurora borealis is formed in this layer.
2
This layer contains the ozone layer.
3
This layer of the atmosphere is the closest to the Earth.
4
There is a lot of this gas in the troposhere. It becomes rain.
5
The exosphere protects us from...
6
This is the coldest layer.
7
This layers separates the Earth from outer space.
8
The ozone layer protects us from the Sun's...
9
There is a lot of this gas in the troposphere. It allows life on Earth.
