The earth's rotation is when it spins around its axis,while an earth's revolution is an complete circle around the sun which takes approximately 365 1/4 days which gives us a year
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half of earths layer
Earths under crust surrounded by Upper Mantle (35-60 km) .The mantle is composed of sillicate rocks that are rich in iron and magnesium relative to the overlying crust.
it gets soggy
No. The crust contains a small fraction of earth's mass. Most of the mass is contained in the mantle.
iron and magnesium