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Moreover, which layer of the Earth is the coolest?
The mantle is the largest layer of theEarth(about 1,802 miles thick) and sits just under the crust.Thislayer is the coolest of the innerlayers,although that doesn't mean to say it's cold. In caseyou werewondering which layer is the hottest then that wouldbe theinner core.
Hereof, which layer of earth has the lowest temperature?
The Lithospheres temperature is about 400degreescelsius. The lithosphere (lower mantle) is rigid partof themantle. The lithosphere is not only part of the mantleitis the crust and the upper part of the mantle together.Thedepth of the lithosphere is 50-100 km thick.
The top of the mesosphere is thecoldestpart of the atmosphere. In the mesosphere, thethin air andsmall amounts of ozone prevent the air from warmingmuch. Carbondioxide in the mesosphere also helps make thislayercold. CO2 molecules absorb heat energy whenthey bounceoff of other molecules.