1. Atmosphere (climate, meteorology)
2. Lithosphere (plate tectonics, erosion, soil formation)
3. Hydrosphere (circulation of the oceans/hydrological cycle)
4. Biosphere (plant and animal communities and ecosystems)http://beri.espp.msu.edu/images/biogeochemicalcycle.gif
By understanding the relationship between these processes a person can begin to think as a gegrapher. Understandings can be devloped as to how features are formed, how plants and animals adapt to different climates, why physical features may change. this leads us to understand how the earth serves as a home for all flora and fauna.
knowledge and understanding of physical processes on the earths surface is crucial as these processes affect human decision making, e.g. locations of safety in an earthquake prone region.
humans can then use this knowledge and understanding to make predictions for the future. We can understand how climate change is linked to differences in economic development around the world. Physical processes may lead to the formation of natural resources and help us to understand human processes which react to physical processes.
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