All the gases that surround the earth are found in

the hydrosphere
the atmosphere
the biosphere
the geosphere

I'm pretty sure your answer would be the atmosphere. Geosphere, Atmosphere, Hydrosphere and Biosphere are the four major spheres of the Earth. If you want to know more to prove my answer, then Cryosphere.

Geosphere: The land mass of the Earth, the rock and the core. It takes up the most of the Earth's space.

Hydrosphere: The bodies of water found on the planet. Oceans, streams, lakes, etc..

Atmosphere: Earth's air and gases make up the atmosphere.

Biosphere: The plants and animals, basically all life that makes up Earth.

Cryosphere: The naturally occurring ice, also called water storage of the Earth. Glaciers are an example of part of the cryosphere.

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the