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Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include the elements iron, nickel, and cobalt, and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone.

Gravitational force is is a force that attracts two objects with mass. We call the gravitational force attractive because it always tries to pull masses together, it never pushes them apart. Every object, including you, is pulling on every other object in the entire universe!

An example of gravitational force in the real world is the force that holds the gases in the sun. The force that causes a ball you throw in the air to come down again. The force that keeps the Earth and all of the planets in line in the proper position in their orbits around the sun.