| A | B |
|---|
| landform | physical feature on the Earth's surface |
| sediment | small pieces of rock broken dow into silt, sand, and clay |
| weathering | process of breaking rock into silt, sand, and clay |
| deposition | process of dropping or depositing in a new location |
| erosion | process of moving sediment from one place to another |
| mass movement | downhill movement of rock and soil because of gravity |
| mudslide | fast, occurs when wet |
| landslide | fast, occurs when dry |
| avalanche | fast, occurs when you have accumulation of snow |
| creep | slow and dry movement |
| sinkhole | rapid caving in of ground |
| crust | outer layer, made of rock, thin compared to other layers |
| core | center layer of Earth, hottest layer, two parts inner and outer |
| inner core | solid iron |
| outer core | liquid molten iron |
| mantle | layer of rock beneath the earths crust, solid but very hot and soft |
| plates | rigid blocks of crust and upper mantle rock that move, 12 plates in all |
| magma | molten rock from Earth's mantle |
| lava | magma that has reached the surface |
| volcano | mountain formed by lava and ash, occur usually at plate boundaries but can be in center of plate over a column of magma, three types |
| earthquake | sudden shaking of ground caused by release of energy due to plate movement |
| fault | an area or place where to plates or pieces of crust slide or bump against each other |
| fossils | remains or traces of past life found in rocks, studied for Earth's history |
| Pangea | supercontinent that divided into Gondwana (southern) and Laurasia (northen) which later became todays continents |
| continental drift | the theory of how Earth's continents move over Earth's surface over time |
