| A | B |
|---|
| delta | soil and sand deposited at a river's mouth and built up over time |
| channel | a body of ater, wider than a strait, between two pieces of land |
| strait | narrow body of water between two pieces of land |
| trench | deep valley on the ocean floor |
| continental shelf | underwater plateau that lies off each coast of a continent |
| island | piece of land smaller thana continent that is completely surrounded by water |
| peninsula | piece of land that is surrounded by water on three sides |
| isthmus | narow piece o lad tht connects two larger pieces of land |
| plateau | flat land at higher elevatons than plains |
| plain | low-lying stretch of flat or gently rolling land |
| elevation | height above sea level |
| glacier | giant sheet of ice |
| erosion | the moving or wearing away of weathered material by water, wind, and ice |
| weathering | the breaking down of surface rocks into smaller pieces by water, frost, chemicals, and plants |
| fault | crack in the earth's crust |
| tsunami | huge wave caused by undersea earthquakes |
| earthquake | violent and sudden movement of the earth's crust |
| plate tectonics | theory that the earth's crust is made up of hge, moving plates of rock |
| continent | one of the major land areas of the earth |
