BIO 130 Midterm: BIO 130 Test 1 Notes
Document Summary
Population momentum (population growth at the national level that would occur even if levels of child- bearing immediately declined to replacement level). Rare earth metals (set of 17 chemical elements in the periodic table, speci cally the 15 lanthanides plus scandium and yttrium). Carrying capacity is an ecological term that refers to the population that an area (in this case, the entire planet) can support without environmental deterioration. The hydrologic or water cycle describes the movement and storage of water between different spheres on the planet. Water is constantly mov- ing between these spheres through the processes of evaporation, precipitation, in ltration, melting, and groundwater ow. Only 3 percent of the earth"s water is freshwater (not salty), and close to 70 percent of that freshwater is frozen in ice caps at the poles and in glaciers. Beyond our obvious uses of freshwater for drinking, bathing, and washing, our society makes use of water for many other purposes.
