| A | B |
|---|
| Gelogic time scale | the outline of earths history |
| Era | the largest division of geological time |
| Big Bang Theory | suggests that all matter (anything that has weight and takes up space) and space were once concentrated in a single dense glowing mass. The mass expoded into billions of galaxies that are moving away from each other |
| Theory | ideas supported be evidence |
| Law | ideas that can be tested and proved |
| Pangea | all the continents on earth were once on giant land mass. Pangea is the given name to this mass. It broke apart in the Mesozoic Era |
| index fossils | used to date the rock layer they are found in |
| trilobite | Paleozoic |
| ammonite | Mesozoic |
| realtive dating | arrange the dates in order |
| extinct | no longer living |
| fossils | a record of past life in the form of a track, a trace or remains preserved in rock. |
| geology | study of the earth |
