2. erosion all the natural processes that wear away earth and rock.

3. evidence the data used to draw a conclusion

4. excavation the process of finding something by digging for it

5. extinct no longer living on the earth; dying out

6. fossils the hardened remains of animals or plants of prehistoric times

7. geologists scientist who study the earth’s crust and its rocks

8. Hypotheses (inferences) scientific suggestions, based on what is known so far

9. paleontologist a scientist who studies prehistoric life

10. specimens samples taken for scientific study

11. theory -a widely held scientific explanation that is based on evidence but cannot be stated as fact

12. emerged began to appear or develop

13. prey an animal hunted or caught by other animals for food

14. marrow the soft material inside bones that is the source of red and many white blood cells

15. embryos animals in their earliest stages of growth, before birth

16. agility the ability to move quickly and easily http://eduplace.com/kids/hmr06/ewordgame/index.html?grade=6&theme=2&selection=3