| A | B |
|---|
| Pangaea | Large land mass that existed before the continents broke apart from one another. |
| Crust | The layer of Earth that we live on. |
| 4 | The number of layers that there are on Earth. |
| Igneous, sedimentary, metamorphic | The three types of rock. |
| Heat and pressure | Needed to form metamorphic rock. |
| Intrusive and extrusive | The two types of igneous rock |
| Sedimentary rock | Forms when rocks undergo cementation and compaction. |
| Igneous rock | Forms when magma cools and makes crystals. |
| Moh's Scale | Scale that measures the hardness of rocks from 1-10 |
| Magma | Comes from underneath the Earth's surface. |
| Lava | Is found above the Earth's surface. |
| Fossil | Preserved remains of plants and animals. |
| Body fossils and trace fossils | The two main types of fossils. |
| Four eras in which organisms lived | Precambrian, Paleozoic, Mesozoic, Cenozoic. |
| Cenozoic | The era we currently live in. |
| Weathering | The breaking up of rocks. |
| Erosion | The moving of pieces of rock from one place to another. |
