The shape of the earth's orbit is elliptical, not circular.
Yes. Although if they were as close to the sun as most of the planets are, they would evaporate quickly.
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the crust is a single layer
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CrustMantleLiquid coreSolid core ON APEXVS
i am not positive, but possibly continental drift
Yes Tis is true
population
how does the earth's movement help us measure time
The major agent of erosion on earthes surface is water running downhill
Day and night are. Also, the spinning of high- and low-pressure weather systems.
It is under lower pressure, however, it is under pressure enough to compress it into a liquid.