assisstance

Chapter 12 Homework

1. Unlike ornithopod footprints, theropod footprints have _____ impressions and lack _____ impressions.

a. claw, heel

b. toe, digit

c. claw, ankle

d. none of the above

2. The longer the relative stride, the faster the _____.

a. gait

b. dimensionless speed

c. pace

d. pace angle

3. Gizzard stones, found with fossils, are called _____.

a. gastromyths

b. gastroliths

c. coprolites

d. behemoths

4. Dinosaur coprolites are known that are as much as _____ centimeters long.

a. 2

b. 200

c. 500

d. 29

5.True or False-- Dinosaur footprints are known from all the continents except Antarctica.

6. True or False--A dinosaur trackway is an obvious example of fossilized behavior.

7. True or False--Dinosaur footprints are given the same Latinized scientific names as are assigned to dinosaur body fossils.

8. True or False--We need to be careful to distinguish footprints from underprints when naming dinosaur footprints.

9.True or False-- Supposed human footprints associated with dinosaur footprints are fakes.

Key Terms: While reading chapter 12, define the following terms:

10. Coprolite

11. Dimensionless speed

12. Egg

13. Extramorphological variation

14. Footprint (track)

15. Gastrolith

16. Gastromyth

17. Nest

18. Pace

19. Pace (or step) angle

20. Stride

21. Trackway

Short Answer

22. What are the principal types of dinosaur trace fossils?

23. What kinds of information can paleontologists obtain from dinosaur footprints?

24. How is the speed of a dinosaur estimated from a trackway?

25. Estimate the speed of a dinosaur with a stride length of 1 meter and a leg length of 1.2 meters.

26. Which dinosaurs laid eggs?

27. What types of information can paleontologists obtain from dinosaur eggs?

28. How are dinosaur gastroliths identified?

29. Why might some dinosaurs swallow stones?

30. Why is it difficult to interpret dinosaur coprolites?