| A | B |
|---|
| erosion | the process by which water, ice, wind, or gravity moves fragments of rock and soil |
| sediment | small, solid particles of material from rocks or organisms which are moved by water or wind, resulting in erosion and deposition |
| deposition | the process by which sediment settles out of the water or wind that is carrying it, and is deposited in a new location |
| mass movement | any one of several processes by which gravity moves sediment downhill |
| runoff | water that flows over the ground surface rather than soaking into the ground |
| stream | a channel through which water is continually flowing downhill |
| river | a large stream |
| 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 |
| 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 the coast |
| sand dune | a deposit of wind-blown sand |
