LIFESCI 2H03 Study Guide - Seafloor Spreading, Wollastonite, Carbon Cycle
15 Apr 2014
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Document Summary
Feedbacks amplify or dampen the initial response. Cooling climate increased: temp. , preciptation, & weathering tundra replaces forests higher albedo, more reflectivity cooler climate. Early earth: more greenhouse gases, weaker solar radiation. Modern earth: less greenhouse gases, stronger solar radiation. Natural process allowing earth to exchange co2 between different components of the system and maintain temperature. Plate tectonics and volcanic activity plays role in balance of co2. Hydrolysis: involves reaction with h20 (rain) forming acid rain which affects rocks on land. H2o + co2 h2co3 (carbonic acid) *c in co2 is organic, hence the organic c cycle. Wollastonite which contains casio3) on land yielding ions (ca2+, si4+, hco-) which are transported to river/ocean water. Ions react with water to form caco3 and sio2 which are used by shell forming organisms. When organisms die, they sink to the bottom, and get buried in the seafloor. *the buried shells are composed of caco3 which has inorganic c, hence the inorganic.
