I am curious of why the Earth rotates? What sparked the initial rotation of the Earth? Please explain in layman's terms.
The Earth rotates because of its formation from the solar nebula, a cloud of gas and dust that surrounded the Sun. As this cloud cooled and collapsed, it spun faster and faster and formed into the planets, including the Earth. The Earth's initial rotation was due to the conservation of angular momentum, which states that an object will continue to rotate in the same direction unless acted upon by an outside force. This initial rotation has been sustained by the Earth's mass distribution and gravitational interactions with the Sun and Moon.
so that's why all the planets' axis are aligned with the sun's ?