| A | B |
|---|
| percolation | the downward movement of water in soil; leaching |
| recharge area | area of land in which water passes downward or sideways into an aquifer |
| discharge area | water flows from an aquifer out through a spring, a well, marsh, bog, lake, geyser, stream or the ocean |
| polar molecule | Chemical bonding is the result of either an atom sharing one or more outer orbit electrons with another atom or an atom taking outer orbit electrons from the atom with which it is bonding (thus, it has a "charge") |
| hydrogen bond | the attraction between liquid water molecules due to their one "end" being positively charged and the other "end" being negatively charged |
| if water were not a polar molecule | it would occur as a gas at room temperature |
| the water-air interface of the water molecule | "skin" of water is able to support small objects/living organisms |
| surface tension | strong, elastic film on water |
| capillary action | as a result of the hydrogen bond, water is able to move upward through plant tissues |
| heat capacity | the ability to hold a great amount of heat |
| heat of vaporization | the heat required to change water form a liquid to a gas |
| latent heat capacity | the release of heat energy when water changes to ice (solid), a considerable amount of heat is released |
| density of liquid water | 800 times denser than air |
| density of frozen water | less dense than liquid water, thus it floats! |
| water is MOST dense at | 4 degrees Celcius (39 degrees F) |
| water | the universal solvent |
| high viscosity of water | resistance to flow |
