1. Atmosphere
2. Hydrosphere
3. Lithosphere and geosphere
4. Biosphere
These
spheres interact by influencing each other and through the
biogeochemical cycles and other natural phenomenon that each one of
these spheres factors and caused.
For the purposes of this
discussion, the geosphere is the part of the Earth's system that
includes the earth's interior, rocks and minerals, landforms and the all
the processes that shape the earth's surface. The earth is not a
perfect sphere. This makes it difficult to calculate the diameter of the
earth but it is still possible to calculate the average diameter of the
earth. It has been calculated that the average diameter of the
geosphere is 12,756km.