| A | B |
|---|
| EROSION | The movement of rock, sand and soil by wind, water or ice |
| SEDIMENT | Small, solid particles of material from rocks or organisms. |
| DEPOSITION | The process by which sediment settles out of the water or wind that is carrying it, and is deposited in a new location. |
| RUNOFF | Water that flows over the ground surface rather than soaking into the ground. |
| GULLY | A large channel in soil formed by erosion. |
| STREAM | A channel through which water is continually flowing downhill. |
| RIVER | A large stream. |
| TRIBUTARY | A stream that flows into a larger stream. |
| DRAINAGE BASIN | The land area from which a river and its tributaries collect their water. |
| FLOOD PLAIN | A broad, flat valley through which a river flows. |
| DELTA | A landform made of sediment that is deposited where a river flows into an ocean or lake. |
| GROUNDWATER | Water that fills the cracks and pores in underground soil and rock layers. |
| STALACTITE | A calcite deposit that hangs from the roof of a cave. |
| STALAGMITE | A cone-shaped calcite deposit that builds up from the floor of a cave. |
| ENERGY | The ability to do work or cause change. |
| LOAD | The amount of sediment that a river or stream carries. |
| FRICTION | The force that opposes the motion of one surface as it moves across another surface. |
| TURBULENCE | A type of water in which, rather than moving downstream, the water moves every which way. |
| GLACIER | A huge mass of ice and snow that moves slowly over the land. |
| ICE AGE | Cold time period in Earth's history, during which glaciers covered large parts of the surface. |
| BEACH | Wave-washed sediment along a coast. |
| SAND DUNE | A deposit of wind-blown sand. |
| CRUST | Outer layer of the Earth |
| CORE | Center of the Earth divided into inner and outer layers |
| MANTLE | The layer of the Earth between the crust and the core |
| TECTONIC PLATE | piece of the Earth's crust |
