Everything in the universe, which has mass, is the source of gravity. Mass is the fundamental property of every object in this universe and it is due to this property that every object attracts other objects.
So, earth is also a source of gravity.
Mass is the source of Earth's gravity. Any object that has mass has gravity.
no. gravity causes objects to fall. So unless the sun(earth's source of gravity) moves, then earth will not "drop"
If we consider classical physics (Newtonian explanations) the source is unaffected. The strength of the gravitational pull decreases as the second power of the distance.
Satellites of the Earth are held in their orbits by the Earth's gravity. That includes the Moon and all the artificial satellites etc. that are up there.
Your question is ambiguous. Are you asking why gravity exists or is gravity or more to the point can Gravity/Magnetism be used as an energy source.
Earth's liquid core. It causes Earth to rotate, thus creating gravity.
gravity
The source of gravity on the Moon is its mass. Gravity is a force that attracts objects with mass towards one another, and the amount of gravity depends on the mass of an object. The Moon's gravity is about 1/6th of Earth's gravity due to its smaller mass.
All matter, including air has a gravitational pull. The gravity we feel, though is not a product of Earth's atmosphere, which has a tiny mass in proportion to the planet itself. Most of the mass of Earth is rock and metal. That is the source of most of Earth's gravity.
It is really difficult to ascertain what the source of gravity is. It cannot be the rotation or the revolution around the sun because the moon also does the same around the earth and its axis yet is one-sixth the gravitational acceleration. Though the earth's profile (geoid) is shaped by the effect of gravity, gravitational acceleration does not have the same magnitude over the earth's atmosphere. One thing we know for sure is that the gravitational force is directed towards the earth's centre and at the earth's centre is the core. This is the source of the magnetic field that repels solar dust and with more research we might be able to fully understand gravity.
Because there's a magnet in the centre of the earth which is known that it's the source of gravity. It's magnetic field is around the earth obviously.
No. The earth has its own gravity. The lunar gravity causes tides on earth, but does not control earth's gravity.