| A | B |
|---|
| infiltration | precipitation that falls on the land and enters the ground, thus becoming groundwater |
| porosity | the percentage of pore space in any material |
| zone of saturation | the surface at which groudwater completly fills all the pores of a material |
| water table | the upper boundry of the zone of saturation |
| permeability | the ability to allow water to pass through a material |
| aquifer | groundwater flow that takes place through permeable layers |
| cave | a natural underground opening with a connection to Earth's surface |
| karst topography | this shows some of the characteristic surface features produced by dissolution of limestone |
| sinkhole | a depression in the ground that has been caused by the collapse of a cave or by the direct dissolution of bedrock by acid rain or moist soil |
| stalactite | cone-shaped or cylindrical forms, made-up from natural deposits that form and hang from a cave's ceiling like icicles |
| stalagmite | mound shaped dripstone deposits that are a result from minerals dripping from stalactites |
| travertine | dripsotne formations that are composed of a certain type of limestone |
| atresian well | fountain of water that spurts above the land surface when a well taps a deep, confined aquifer containing water under pressure |
| drawdown | the difference between the original water-table level and the water level in a pumped well |
| geyser | explosive hot springs that erupt at regular intervals |
| hot spring | a spring that discharges warm/hot water |
| recharge | a process in which water from precipitation and run-off is added back to the zone of saturation |
| spring | natrual discharges of groundwater |
| well | a hole dug or drilled deep into the ground to reach a reservoir of groundwater |
