None. (At least through high school...!) As an additional note, the correspondence of the magnetic field with the spin axis is not well linked, and many bodies have spin and magnetic axes very far apart.
That angle changes with location on the Earth. The only places where the forces
of both of them are parallel would be if you were standing at the Earth's north or
south magnetic poles.
The force of gravity is always nominally toward the center of the Earth (local "down"),
with no horizontal component. But the force on a magnet due to the Earth's magnetic
field has a horizontal component everywhere, except at the magnetic poles.
There is no such thing as a "gravitational pole." Earth's magnetic poles periodically switch. Currently we have no way of predicting when this might happen.
As you get further away from Earth, the gravitational forces between you and Earth decrease. But the gravitational forces between you and something else might increase, like between you and the moon, or between you and the sun.
No, not at all. The gravitational force depends only on the masses involved, and on the distance between the masses. Magnetism should be considered a separate force - and it has no effect on gravity.
At what height in kilometers above the surface of the Earth is there a 4% difference between the approximate gravitational force mg and the actual gravitational force on an object
The mutual gravitational attraction between you and the earth.
15
15
Since the Earth's magnetic poles are not located at the geographic poles, a magnetic compass doesn't point to 'true' (geographic) north. The DIFFERENCE angle between magnetic north and true north is the magnetic variation or declination where you are. It changes for different locations.
no but they two pretty close
The earth's constant orbit around the sun is caused by an equilibrium between two forces - the gravitational pull of the sun, and the earth's velocity acting at a right angle to it. If that gravitational pull was suddenly eliminated, the earth would continue onwards in a straight line.
because of the earth gravitational and magnetic pull
That all depends on WHERE on the earth you are located. The angle between the direction to the north geographic pole and the north magnetic pole is different at different places. Go to "Google.com" and search for "magnetic declination". You'll get plenty to read, and ways to determine what the angle is at your location.
The gravitational force between the Earth and sun certainly depends on the distance between the Earth and sun. But the gravitational force between, for example, the Earth and me does not.
the magnetic field of earth is parallel to the earth surface
Earth has gravity or gravitational force that attracts the moon to the Earth.
The core of the Earth is mostly liquid metal churning around and rubbing against the steel-rich mantle. This causes a polar magnetic field with a north and south pole.
The angle of magnetic North form Earth's true North (the axis of its rotation) drifts slowly with time. See the related link below for a detailed explanation.