What cause the rotation of earth?

Answer 1

Angular momentum in the cloud of stuff from which it formed was conserved,

meaning that the Earth was formed spinning. Since there's no substantial force

acting on it to make it stop, it continues to spin ... slowing down ever so gradually,

from the point of view of a human lifetime, because of the frictional 'drag' of the

ocean tides.

Answer 2

Before the earth was formed, there was a lot of dust masses rotating around a bigger mass which was in the center. Dust masses continued to impact the bigger mass, and made the bigger mass spin around it's axis.

Answer 3

The Earth rotates because it does. Nothing "causes" it; the protoplanetary dust cloud from which the Earth was formed was probably rotating on its own, even BEFORE being struck by the planet-destroying body that crashed obliquely into the Earth and created the Moon.

After that, simple conservation of angular momentum has kept the Earth turning.

Answer 4

A rotating object has the tendency to continue rotating (Law of Conservation of Angular Momentum). When the Earth formed, the parts that made it up must have given it some initial rotation; this happens easily if the parts that get together don't all impact at the exact center of the newly forming planet, but have some sideways motion. And, Earth is still rotating today. The rotation is gradually getting slower, though, due to gravitational forces from the Moon.

Answer 5

yes, yes it does....