| A | B |
| fossil | prints or parts of animals from long ago |
| rock | where fossils are found |
| cast | when sand or mud fill in molds |
| mold | the imprint that gets filled in by sand or mud |
| dinosaur | creature of long ago |
| extinct | if something no longer living |
| tar | where animals get trapped |
| bones | Paleontologists hunt for fossils and |
| paleontologist | fossil hunter and explorer |