BIO 262 Lecture Notes - Lecture 7: Humidity, Volcanic Ash, Aquifer
28 Apr 2019
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Document Summary
Collects, purifies, distributes earth"s fixed supply of water. Powered by energy from the sun (evaporation) & gravity. Winds & air masses transport water over earth"s surface. Humidity (amount of h2o vapor in air) Relative humidity - h2o vapor % maximum air could hold at. Dew point temperature at which condensation occurs. Particles for h2o vapor to collect - precipitation. Most over land becomes runoff (to streams, rivers, lakes, oceans) Other results of precipitation & water cycle: Filtration in rivers, streams, soil, rock to aquifers. Groundwater depletion aquifer used, infusion of sw. Less infiltration to soil & aquifers. Carbon central element in biological molecules. Too much co2 removed = atm cools. Too much co2 generated = atmwarms (greenhouse) Producers remove co2 from atm convert to glucose. Oxygen & hydrogen cycle ~ instep with carbon. Some reacts with water to form hco3. Gained from atmosphere as more builds up in atmosphere. Some removed in caco3(coral, coralline algae, mollusks)
