| 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 in layers. |
| 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 |
| tributary | a stream that flows into a large stream |
| 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 |
| island | a land area completely surrounded by water |
| energy | the ability to do work or cause change |
| potential energy | energy that is stored and available to be used later |
| kinetic energy | the form of energy an object has because of its motion |
| friction | the force that opposes the motion of one surface as it moves across another surface |
| glacier | a huge mass of ice and snow that moves slowly over the land |
| loess | a wind-formed deposit made of fine particles of clay and silt |
