| Term | Definition |
| deposition | the process of dropping or depositing sediment in a new location. |
| earthquake | a shaking of the ground caused by the sudden release of energy in the earths crust. |
| volcano | a mountain formed by lava and ash. |
| fault | a break or place where pieces of the earths crust move |
| erosion | the process of moving sediment from one place to another |
| weathering | the process of breaking rock into soil, sand and other tiny pieces. |
| delta | large areas of deposited sediment at the mouth of a river. |
| constructive processes | forces that build new landforms such as deposition earthquakes, volcanos and faults. |
| destructive processes | forces that destroy landforms such as erosion weathering volcanos earthquakes and organisms. |
| sediment | tiny bits of rock soil sand and other things that can be moved and deposited in new places. |