Why does the earth spin around while its moving around the sun?

Answer 1

An immense number of millions or billions of years ago, a huge star exploded. This was called a "Supernova". This blast was so powerful that it shot dust and rocks and atoms of hydrogen and some helium billions of miles away from it into what is called a 'cloud' that was all around the supernova.

Because things were not quite in balance, many parts of this cloud, still moving unbelievably fast through space, started swirling around. Eventually, this swirling made the dust and rock thicker near the center of each swirl until its force of gravity became strong enough to pull in more and more dust and rock and hydrogen and helium into the swirl's center.

In some of these swirls, there was a huge enough amount of material to collect into a giant ball, which increased the force of gravity toward the ball's center. These became stars . . . like our Sun, for instance. Smaller swirls turned into planets and planetoids. In our solar system, only the Sun ever got big enough to get enough force of gravity enough to start nuclear fusion, thus becoming a hot star.

To get to your answer: All of the above never stopped swirling, even after the swirls became giant balls. So the balls kept spinning and revolving around the stars. This is still happening, billions and billions of years later because there is hardly anything in space that would slow down the spinning and revolving. The Earth is one of these spinning balls that is still spinning and still revolving around its star, the Sun.