SmithLifeScience                                Name __________________ Period _____

Darwin2.bmp (38358 bytes) Reading Study Guide Chapter 6 Changes Over Time
6-1 Darwin's Theory  (pp.172-179)

Page 172
1. When did Darwin begin his voyage? ________________________

2. What was the name of Darwin's ship? _________________________


Darwin's Observations (p.173)

3. After leaving South America where did the Beagle go? ______________

4. What is a species?
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5. Scientists have identified ________________ species of organisms on Earth.

6. What is a fossil?
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Galapagos Organisms (p.174-175)

7. Small clawed Iguanas eat _________________.

8. Large clawed Iguanas eat _________________.

9. Name another difference between the iguanas on page 174. _______________________

10. How can you tell which island a tortoise came from? ____________________________

11. What is an adaptation?
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12-13. Identify: Insect Eater or Seed Eater
                                 

   12 beak6.GIF (1282 bytes) 13 beak4.GIF (1309 bytes)

                                    
Evolution (p.176)

14. What is an evolution?
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15. What is a scientific theory?
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Selective breeding involves breeding animals with similar characteristics that are desired.
Name two animals that Darwin mentioned that were selectively bred?

16. ____________________          17. ____________________

Natural Selection (pp.177-179))

18. What is the name of Darwin's book? ____________________________

19. In his book, Darwin proposed that evolution occurs by means of ___________________

20. What is natural selection?
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21-23 Identify as Overproduction, Variation, or Competition

21. A faster turtle may escape being eaten by a predator. ___________________

22. Each turtle has slightly different traits. ___________________

23. Turtles lay many eggs because some won't survive. ___________________


24. Darwin proposed that over a long period of time natural selection can lead to ______

Writing In Science

25-30. You are a newspaper reporter during the 1900's. Your job is to interview Charles Darwin.  Write two scientific questions you would ask him.  Then write answers that Darwin would have given from his point of view.

25. Q#1 _____________________________________________________________
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26. Answer ___________________________________________________________


27. Q#2 _____________________________________________________________
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28. Answer ___________________________________________________________