| A | B |
|---|
| geology | The scientific study of the Earth's history. |
| geologic time line | The time line line of the Earth broken up into 4 main time groups: Precambrian, Palizoic, Mesozoic, and Cenozoic. |
| era | a time period |
| The Big Bang Theory | A theory that tells us that the earth was formed by a big collision of matter that is still expanding |
| Theory | Ideas that are supported by evedence |
| Law | Ideas that can be retested and proven |
| Pangaea | All the continents on earth were once one giant land mass. Then it broke up. |
| fossils | A trace of an organism of the past such as: skeletons, footprints and imprints |
| index fossils | ? |
| trilobite | an old organizom that lived in the Paizoic era. |
| ammonite | an old organizom that lived in the Paizoic era. |
| extinct | an organism that has died off and disappeared completely |
| relative dating | putting something in order by what happened in time but not knowing the date |
