EVPP 108 Lecture Notes - Lecture 35: Biogeochemical Cycle, Hydrosphere, Chemical Reaction
7 Mar 2018
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A biogeochemical cycle is the complete path a chemical takes through the four major components of. Solar energy, the cycling of (cid:373)atter, a(cid:374)d gra(cid:448)it(cid:455) sustai(cid:374) the earth"s life. An ecosystem survives by a combination of energy flow and matter recycling. Chemical reactions: a process in which new chemicals are formed from elements and compounds that undergo a chemical change. Weak carbonic acid reacts w/ rock and soil. The two reactions start with same compounds but end up with very different products. The si(cid:373)plest (cid:449)a(cid:455) to thi(cid:374)k of bgc (cid:272)(cid:455)(cid:272)les is a (cid:862)(cid:271)o(cid:454) a(cid:374)d arro(cid:449)(cid:863) diagra(cid:373: sometimes useful to consider a global perspective, global climate change, other times may need to viewed at local scale. Chemicals in the four major components have different average storage time. Long in rocks: short in the atmosphere. Global cycles recycle nutrients through the earth"s air, la(cid:374)d, (cid:449)ater, a(cid:374)d li(cid:448)i(cid:374)g orga(cid:374)is(cid:373)s. Nutrients are the elements and compounds that organisms need to live, grow, and reproduce.
