| A | B |
| Conservation | allows the use of resources in a responseable manner |
| Preservation | setting aside areas & protecting them from human activities |
| Parts of hydrologic cycle | evaporation, transpiration, runoff, condensation, precipitation |
| Aquifer | any water bearing layer in the ground |
| Cone of depression | lowering of the water table around a pumping well |
| Salt water intrusion | near the coast, overpumping of groundwater causes saltwater to move into the water |
| ENSO | El Nino Southern Oscillation see sawing of air pressure over the south pacific |
| During el nino | trade winds weaken and warm water sloshed to south america |
| Non el nino | easterly trade winds and ocean currents pool warm water into the pacific allowing upwelling of nutrient rich water off the west coast of South America |
| Effects of el nino | disrupts food chains, US has mild winters, sw us has increased rainfalls |