EESA01H3 Chapter 11: CHAPTER 11 DETAILED NOTES FOR 4.0
24 Apr 2011
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F reshwater systems: roughly 97. 5% of earth"s water resides on the oceans and is too salty to drink or to use to water crops, 2. 5% is considered freshwater , water that is relatively pure, with few dissolved salts. Rivers and streams wind through landscapes: water from rain, snowmelt, or springs runs downhill and converges where the land dips lowest, forming streams, creeks or brooks, these watercourses merge into rivers, which eventually lead to ocean. a small river flowing into a larger one is a tributary. meanwhile, sediment is deposited along the inside of the bend, where water currents are weaker. Lakes as big as the great lakes hold so much water that their biota is adapted to open water making them differ substantially in their characteristics from small lakes. an aquifers upper layer (zone of aeration) contains pore spaces filled with air.
