| A | B |
|---|
| hydrologic cycle | the continous circulation of water between the atmosphere, oceans, and Earth |
| drainage basin | an area drained by a major river and its tributaries |
| ground water | the water held in the pores of rock |
| water table | the level at which the rock is saturated |
| landforms | naturally formed features on the surface of the earth |
| delta | a triangular area of land formed from deposits at the mouth of a river |
| island | a body of land completely surrounded by water |
| oasis | a spot of fertile land in a desert, fed by water from wells or underground springs |
| valley | low land between hills or mountains |
| glacier | a large ice mass that moves slowly down a mountain or over land |
| canyon | a narrow, deep valley with steep sides |
| plateau | a broad, flat area of the land higher than the surrounding land |
| continental shelf | The earth’s surface from the edge of a continent to the deep part of the ocean |
| topography | the combination of the surface shape and composition of the landforms and their distribution in a region |
| isthmus | narrow piece of land connecting two larger pieces of land |
| peninsula | land surrounded by water on three sides |
| crust | the outermost layer of earth |
| magma | liquid rock inside of Earth |
| plate tectonics | theory that explains how forces within the planet create landforms |
| erosion | the movement of surface material from one location to another |
| wind, rain, & ice | causes of erosion |
| desalinization | removal of salt from ocean water |
| tributary | a smaller stream that flows into a larger river |
| irrigation | artifically suppling water to the land |
| soil exhaustion | overuse of soil making it useless for farming |
| deforestation | destruction or loss of forests |
| reforestation | replanting of trees |
| aqueducts | artificial chanels for suppling water |
| aquifers | layers of rock where groundwater is found |
| fossil fuels | energy resources formed from ancient plants |
| hydroelectric power | electricity produced by moving water |
| geothermal energy | heat from Eatrh's interior used to make electricity |
