This region outside of the Earth is referred to as the magnetosphere. The charged particles that are caught in the magnetosphere are being ejected by the Sun in a stream of matter called the solar wind. This interaction with the magnetic field produces the aurorae seen around the Earth's poles. Metamorphic rocks are created when high temperatures or pressures alter igneous or sedimentary rocks physically or chemically. Metamorphic rocks are produced when geological activity carries surface rocks below the surface and brings them back up again.
Primitive rocks are rocks that have escaped chemical modifications.
These rocks represent the initial stuff that the planetary system was made from. No such rock exists on Earth. This is why comets and asteroids are so interesting. Heat escaping from the interior of the Earth supplies the energy needed to produce mountains, valleys, volcanoes, and earthquakes. Plate tectonics describes how slow motions within the mantle of the earth move large plates on the Earth's surface.