What MAKES the earth rotate??

Answer 1

Question :
Why does the Earth rotate on it's axis?
what is it that makes it do this rotational movement?

Answer:

It's because if conservation of angular momentum. In a little more detail, when the solar system was forming, the whole disk of gas anddust was spinning. When the planets formed, they were not only orbiting in the same direction as the original disk, but they were also spinning/rotating in that direction. (There are a couple of exceptions but that happened after formation).

Answer 2

Quoting the source below: "I think it is related to the effect that
we have seen when a skater who has arms extended and is slowly spinning suddenly pullls the arms into the body surface. The result is that spin rate increases. To even spin faster the skater will be standing straight with the arms up over the head. This makes the distributions of mass as close toe the spin axis as possible and makes the spin as large as possible. The main idea is that angular momentum is conserved, ie, cannot change. Angular momentum is the product of the spin rate and the moment of inertia ( a measure of the distribution of the mass about the axis of rotation) The product is constant. If mass is widely dispersed as before condensing into a planet, and is very slowly rotating, then when it condenses into a planet (making a small moment of inertia) the rate of rotation could be large. So condensing amplifies whatever
rotation there was initially. NOw, what are the chances of something not rotating exactly before it condenses? Apparently, very small since everything seems to have some rotation. I am not sure this gets to your question of why, but it has been a great question to think about. "

Answer 3

The earth rotates simply because it has not yet stopped moving. The Solar System, and indeed the Galaxy, were formed by the condensation of a rotating mass of gas.

Conservation of angular momentum meant that any bodies formed from the gas would themselves be rotating. As frictional and other forces in space are very small, rotating bodies, including the Earth, slow only very gradually.

Answer 4

Gravitation makes the earth rotate around the sun. It doesn't fall into the sun because it had and initial velocity when the solar system was formed. The earth rotates around itself because of the initial spin acquired when it was formed by a whirpool of particles. The friction caused by sea tides makes the earth slowing down in it's rotation around itself. So the days slowly become longer.

Answer 5

Something called "conservation of angular momentum". The earth has always
been rotating, and that means it is going to keep on rotating forever. This
is one of those fundamental laws of physics (deriving from Newton's laws)
that nobody believes can ever be broken. However, the Earth's rotation can
change slightly over time due to the tidal interactions with the Moon and
Sun. To stop the Earth's rotation would require an enormous amount of
energy, and whatever did it would probably have the same destructive power
as the biggest asteroid that could ever possibly hit us. In other words,
life would be destroyed. Not to mention that if the Earth under our feet
quit moving, we would continue along at our current 17 miles/minute or 1000
miles/hour - can you imagine suddenly being launched out of your chair at
1000 miles/hour?
Stars and planets form as a result of the gravitational collapse of accreting material. Any net translational motion of that initial material is accelerated as its radius of rotation decreases. This is due to the same conservation of angular momentum principle that makes skaters and divers spin more rapidly when they bring their arms closer to their bodies. In its extreme, this effect can make collapsed neutron starts spin many times each second, creating the regular beat of pulsars as observed from Earth.

Once an initial spin was established for the Earth, the same conservation principle says that its angular momentum will continue unless it can be transferred to another object. With no significant frictional forces to allow that to happen, the Earth can continue to spin indefinitely without any further prodding. (More on that later.)

It is incorrect to say that the Moon does not spin. It rotates on its axis in synch with its revolution around the Earth, keeping the same face always pointed toward us. If it did not rotate at all, we would see all of its surface over the course of one month's orbit. This condition was created by tidal forces between the Earth and Moon, gradually slowing its initial rotation until the current more stable situation evolved. This same 'tidal lock' condition has been observed for satellite closely orbiting other planets. Because of its elliptical orbit, a slight 'wobble' allows us to actually see slightly more than half of the Moon's surface over the course of a month.

Tidal forces, by the way, continue to affect the Earth/Moon system. They exert enough frictional force on the Earth so that some of its angular momentum IS being transferred slowly to the Moon. The net effect of that is to gradually slow down Earth's rotation and lengthen the day. Where is that energy and momentum going? The moon is gradually receding from the Earth. Both of these effects are small. The Moon is receding at a rate of less than 2 inches per year and the day is getting longer by one second every 67,000 years or so.

Answer 6

the earth rotation is due to the different forces that occurs in the universe such as the sun gravity , the moon gravity , its own gravity , the center of universe gravity , other planets' and many more forces that occurs in this universe , thus u can consider that this rotation is due to the result of all these occurs if u will consider earth as the point of application of these forces
same occurs to the rest of any planet in this universe

Answer 7

Gravity

Answer 8

The gravitational pull of the sun keeps it rotating. If you don't believe that then it is really Apollo flying his chariot across the sky while earth sits on Atlas's back.

Answer 9

Inertia.

Answer 10

Check it out for yourself, it's more fun to learn than to hear.