Across

4. Frozen water covered much of the land during the _ _ _ Ages.

6. Three-horned dinosaur

9. Ancient leafy plant found in many homes

10. Skeletons are made of these.

12. Ancient elephant

14. Many fossils at The Field _ _ _ _ _ _.

18. Not really a sabertooth "tiger." It is a sabertooth _ _ _.

19. Makes up genes (DeoxyriboNucleic Acid)

20. Some animals got stuck in tar _ _ _ _ and became fossils.

21. A slug with a shell

23. Evidence of ancient life

25. The Apatosaurus has a long _ _ _ _.

26. Number of tails on a Brachiosaurus

27. Fossils are found in _ _ _ _.

Down

1. "Terrible lizard"

2. Used for chewing

3. Flying mammal

5. Dinosaurs hatched from these.

6. Evolution occurs slowly over _ _ _ _.

7. These flying reptiles were not dinosaurs.

8. Large, slow moving animal.

11. Brachiosaurus means _ _ _ lizard.

13. Long teeth on a mastodon

15. Completely died out

16. River of ice

17. Wrote about evolution

18. _ _ _ _ is made of fossil plants.

22. Exhibit at The Field Museum: _ _ _ _ Over Time

23. Large flying insect = dragon _ _ _

24. Amber is tree _ _ _ that has become a fossil.

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