| A | B |
|---|
| landform | a natural land shape or feature like hills, mountains, dunes |
| sand dune | a hill made of sand blown and shaped by wind |
| canyon | a deep valley with steep sides shaped by water |
| weathering | wind blows sand against a rock and breaks the rock into smaller pieces |
| erosion | the process of moving sediment by wind, water or ice |
| delta | new land at a river's mouth caused by deposition when the water slows down |
| sediment | soil and small pieces of rock |
| deposition | the process by which sediment drops out of water |
| earthquake | A sudden release of energy in Earth's crust. |
| magma | melted, or molten, rock beneath the Earth's surface |
| lava | magna that has reached the Earth's surface |
| volcano | a mountain made of lava, ash or other materials |
| constructive forces | forces which build up landforms |
| destructive forces | forces which break down landforms |
| alluvial fan | the deposition of a stream when it empties on flat land |
| stalactites | deposition of minerals in groundwater on the ceilings of caves |
| stalagmites | deposition of minerals on the ground of caves |
