For AS Environmental Studies/ Science (Lithosphere) and also new A'level Geography Specification (Carbon Cycle focus)<br /> The different states of the biogeochemical cycles: atmospheric, biological, hydrological, lithosphere<br /> For each cycle the processes and stores; with impacts humans have on the natural dynamic equilibrium between these factors. <br /> Further student research on the Gaia Theory and also past AQA Environmental summary questions at the end of each cycle.<br /> <br /> Accompanying power-point with answers for handout