its when the earth moves
an orbit
That answer depends on perspective. It moves from west to east.
In its orbit around the Sun, the Earth moves at about 30 km/sec.
The earth's center of gravity is the center of the earth, or the center of the mass with the mass being the earth. The earth spins as it moves through space on account of sun's gravitational forces and because there is nothing in space to get in the way or stop the earth from rotating.
the wind moves it
what does earth spin on besides a inmaginary line? ============== Planet Earth rotates on its axis.
Its the earth that moves, not the Sun. This happens because the Earth rotates towards the east. Here's a way to see how this works. Sit in a chair that can spin, and turn on a lamp across from you. Give the chair a spin but sit still and don't move your head. You will see the lamp move across your field of view just like the Sun moves across Earth's field of view (the sky).
No, it takes 24 hours for the Earth to spin.
Each spin of the earth is called a rotation of the earth on it's axis.
The rotation of the planet on its axis of spin. The spin is responsible for the day and the night.
The Earth spins on an axis.