.

In this way, what happens to gravity at the center of the Earth?

At the center of the Earth, the gravitational force is zero, but the gravitational well is at its deepest. If I drop a ball here on the surface of Earth, it will accelerate downwards at about 10m/s2 This is because the gravitational force pulls it down. Gravitational force pulls things toward the center of the Earth.

Additionally, in what way does gravity change with distance from Earth? the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases. If the distance is doubled, the force of gravity is one-fourth as strong as before.

Herein, is there gravity at the Centre of the earth?

If you are at the center of the earth, gravity is zero because all the mass around you is pulling "up" (every direction there is up!).

What prevents gravity from pulling you through the ground to the center of Earth?

The same thing that prevents gravity from pulling you to the center of the Earth; electromagnetic repulsion, or more properly, electron degeneracy pressure. So, when you or water are sitting on the surface of the Earth, the Earth's electrons are effectively pushing back against you to keep you where you are.