| A | B |
|---|
| erosion | wearing away of earth and rock |
| evidence | information used to draw a conclusion |
| excavation | digging to find something |
| extinct | no longer living on Earth |
| fossils | remains of animals or plants |
| geologists | scientists who study rocks |
| hypotheses | scientific guesses |
| paleontologist | scientist who studies ancient life |
| specimens | samples for scientific study |
| theory | possible explanation |
