But we're the only planet that has plates , and erosion is a more important force than on other planets. Earth has liquid water in large quantities, and large ice caps holding more water. Layer of water is termed hydrosphere .
Earth has a diversity of life, on the surface, underground, under ice caps, etc.
This is the biosphere. The Interior of Earth Use earthquakes to probe structure of interior. Lithosphere which is cool and rigid and about 100 km. thick Mantle below the lithosphere that is warmer and partially molten. Where magma for volcanic eruptions comes from. The deepest layers of the mantle are under such high pressure, the rock is solid in spite of being hot.