Posted by Amanda on Tuesday, July 6, 2010 at 11:28pm.
No; they are not the same thing. The rock cycle takes place on a VERY long time scale.. hundreds of millions of years, and involves all of the earth's crust returned to the core of the Earth, to return later as lava.
See
http://www.learner.org/interactives/rockcycle/diagram.html
The phosphorus cycle is the recycling of phosphates into living things as a result of erosion, participation in life processes, and the return of dead biotic material to the soil.
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