| Term | Definition |
| weathering | the breaking down of rock on the surface of the Earth usually by the force of water, wind, or ice |
| erosion | The movement of weathered particles by water, wind, or ice |
| deposition | the process in which materials that have been eroded are dropped in a new place |
| landform | a natural structure found on the surface of the Earth |
| glacier | a huge piece of ice that slowly moves across the surface of the Earth and remains frozen during the entire year |
| fault | a crack in the Earth's crust |
| earthquake | the shaking of the Earth's crust |
| volcano | a mountain made from the hardened lava, rocks and ash that erupted out from underneath the Earth's surface |
| magma | melted rock below the Earth's surface |
| lava | magma that has flowed out onto the surface of the Earth |