| A | B |
|---|
| erosion | all the natural processes that wear away earth and rock |
| evidence | data used to draw a conclusion |
| excavation | process of finding something by digging for it |
| extinct | no longer living on earth |
| fossils | hardened skeletons or other remains of creatures |
| geologists | scientists who study the earth's crust and rocks |
| hypothesis | scientific suggestions based on what is known |
| paleontologist | scientist who studies prehistoric life |
| specimen | sample taken for scientific study |
| theory | idea that is based on evidence but that can't be stated as fact |
