<span>Phosphorous cycle. </span> It differs from the other major biogeochemical cycles in that it does not include a gas phase
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An oil spill, fertilizer run off, and another thing i could think of is a flood hope this helped :)
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1. Before: carbon dioxide After: Oxygen
2. Oxygen
3. Chloroplast
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The earth is a vast, complex system powered by two sources of energy: an internal source (the decay of radioactive elements in the geosphere, which generates geothermal heat) and an external source (the solar radiation received from the Sun); the vast majority of the energy in the earth system comes from the Sun.
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).
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