| Question |
Answer |
| karst topography | areas where landscapes have been shaped by the dissolving power of groundwater; area has sinkholes and caves |
| limestone | a sedimentary rock that can be dissolved by groundwater to create caves |
| carbonic acid | found in most natural water; this chemical dissolves limestone to form caverns |
| cavern | naturally formed underground chamber |
| stalactite | icicle-like stone pendants that hang from the ceiling of a cavern |
| stalagmites | formations that develop on the floor of a cavern |
| sinkhole | depression formed when limestone below the soil is dissolved |
| artesian well | well in which the water naturally rises above the level of the water table |
| aquifer | rock or soil through which groundwater moves easily |
| zone of saturation | depth below earth's surface where groundwater completely fills all pore space |
| zone of aeration | area below earth's surface where the soil is moist, but the pores are filled mostly with air |
| water table | boundary between the zone of aeration and zone of saturation |
| subsidence | when groundwater is pumped from a well faster than it is recharged, causing the water table to lower and land to sink |
| spring | natural discharge of water where an aquifer and aquiclude meet |
| aquiclude | impermeable layer under earth's surface |
| permeable | ability to let water pass through |
| geyser | explosive hot spring where water erupts from earth due to heating from igneous activity |
| watershed | land area in which all water drains into a single river |
| estuary | area where the mouth of a river opens into an ocean; mix of freshwater and salt water |
| river delta | Triangular deposit of sediment where water empties into an ocean or lake |
| alluvial fan | River water emptied from mountain valley onto an open ; deposits (drops) sediment in a fan shape |
HHS Shrek
