| A | B |
|---|
| Pangaea | A "super-continent" that was a single landmass about 260 million years ago |
| Geologic Time Scale | chronological model of the geologic history of Earth using the divisions of time- eon, eras, periods and epochs |
| Law of Superposition | Principle that States that the youngest layers or rock lay above the older layers of rocks if they have not been distrubed |
| intrusive igneous rock | Molten rock from the earth's interior that pressed to the existing rock and cools. |
| Fault | A crack in the earth's crust along which blocks of crust slide in relation to each other. |
| Plate Tectonics | Explains how the large pieces of the outermost layer of the earth(continents), called plates, move and change shape. |
| Mold Fossil | Is formed when sediment becomes rock leaving a cavity in the shape of the body |
| Cast Fossil | Forms when a mold is filled with sand or mud which hardens in the shape of the body |
| Petrified Fossil | Where minerals replace the buried remains, and change them in rock |
| Preserved Fossil | Forms when entire organisms or parts of organisms are prevented from decaying due to be trapped in rock, ice, tar, or amber |
| Trace Fossil | Forms when mud or sand hardens in stone where a fingerprint, trail, or burrow of a body had been left behind cylinders |
| Ice Core | Ice cylinders that are drilled of polar glaciers and ice sheets. They provide information on how the climate of the earth and the atmosphere has changed over time. |
| eons, eras, periods, epochs | the order of time divisions from large to small |
| Eons | the largest division of geologic time |
| Folding | the bending of rock layers due to stress |
