n. Physical properties-the result of hydrogen bonding Studied in isolation, the water molecule is deceptively simple. Its tow hydrogen atoms are joined to the oxygen atom by single covalent bonds. Because oxygen is more electronegative than hydrogen, the electrons of the polar bonds spend more time closer to the oxygen atom. In other words, the bonds that hold together the atoms in a water molecule are polar covalent bonds, with the oxygen region of the …showed first 75 words of 3108 total…

…showed last 75 words of 3108 total…these microorganisms consume oxygen that is dissolved in the water. Oxygen levels in the water may drop to such dangerously low levels that oxygen-dependent animals in the water, such as fish, die. This process of depleting oxygen to deadly levels is called eutrophication. References www.waterinfo.org/ www.uwin.siu.edu/ www.funredes.org/agua/english/general.html www.ga.usgs.gov/edu www.encarta.com http://water.usgs.gov/wicp http://water.usgs.gov/