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Earth's shape is oblate spheroid.
No,pPlanets are NOT elliptical in shape, they are basically spheres. However their spherical shape is distorted by the centrifugal forces resulting form their spin. This makes their equators fatter and their shape becomes that of an "Oblate Spheroid". The Earth is an oblate spheroid. It is a sphere, but measured around the equator it is slightly larger than measured along the Prime Meridian/International Date Line.
The circumference of the Earth at the equator is about 24,901 miles, or 40,075 km. Earth is not a sphere, but is "flattened" at the poles. or oblate spheroid.
The surface of the earth is called the crust. I hope this is the answer you need.
Day and night for a start. The velocity of the rotation of Earth has had various effects over time, including the Earth's shape (an oblate spheroid), climate, ocean depth and currents, and tectonic forces