Question

Which statement best explains why objects are pulled toward Earth’s center?

Earth has a magnetic force that is strongest at its core.
Earth has a much greater mass than objects on its surface.
The weight of the atmosphere pushes objects toward Earth's surface.
The strength of the Sun’s gravity pushes down on objects at Earth's surface.

Answer 1

Earth has a much greater mass than objects on its surface.

Gravity is a force that masses exert on each other; because Earth’s mass is so large, it pulls objects toward its center (the net gravitational pull of a roughly spherical mass points toward its center).