| A | B |
|---|
| water cycle | movement of water between the atmosphere and the earth's surface |
| groundwater | water that sinks into the ground |
| runoff | water that runs over the earth's surface and flows into stream's |
| porous | containing many spaces through which air and water can move |
| water table | top of the groundwater layer |
| spring | a place where groundwater flows naturally out of the ground |
| geyser | place where hot groundwater and steam blast into the air |
| sinkhole | funnel-shaped depression that results when the roof of a cave collapses |
| tributary | river that joins another river of equal or greater size |
| drainage basin | land area that is drained by a river and its tributaries |
| reservoir | artificial lake created by placing a dam across a river |
| precipitation | condensed water vapor that is pulled down by gravity in the form of rain, snow, sleet or hail |
| condensation | the change of water from a gas to a liquid |
| evaporation | when water is converted from a liquid to a gas or vapor |
