| A | B |
|---|
| FOLDS | THE BEND IN THE EARTH'S CRUST THAT FORMS MOUNTAINS |
| anticline | the up-fold of a mountian |
| syncline | the down-fold of a mountian |
| fault | a very large crack in the rock |
| absolute age | comparison of the age of one rock sample to another |
| relative age | the dating of a rock in terms of EXACT years |
| principle of superposition | rule that states that layers above other layers are younger than the bottom layers |
| fossil | rock- like remains of organisms or traces of organisms |
| mould | imprint of living things left on rocks |
| cast | when something like sediments or chemicals fill in the marks left by fossils |
