Guided Reading: History of Life on Earth - Weebly



Name: ________________________________________________________________ Date: ________________ Period: _______

Guided Reading: History of Life on Earth

Use the reading document provided (or pages 444 to 459 in your text book) to answer the following questions

Section 1: How did life begin?

1. Scientists Oparin and Haldane suggested that the early oceans contained large amounts of organic molecules. How did they propose that these molecules were formed?

2. Oparin and Urey hypothesized that the atmosphere was rich in which gasses?

3. The Miller-Urey experiment

a. What did this experiment demonstrate?

b. Label the parts of the Miller-Urey experiment devise:

[pic]

Section 2: The Age of the Earth?

4. What does the Fossil record include?

5. What else does the fossil record provide evidence of?

6. In what kind of rock are most fossils found?

7. Which environments are conducive to fossil formation?

8. If an organism dies in an environment that is conducive to fossil formation but a fossil isn’t formed, what could be the reason?

9. What is the principle of superposition?

10. What are the most common types of fossils?

11. When organisms in-between rock break down, what do the hollow spaces become filled with?

12. What kind of fossils allow for soft parts of tissue to be preserved in detail?

13. Relative dating cannot reveal a fossil’s age in years, but what can it reveal?

14. What are index fossils and what are they used for?

15. How is radiometric dating different from relative dating?

16. What is the geologic time scale based on?

17. What is extinction?

18. What is a mass extinction?

Section 3: Evolution of Life

19. When was the Precambrian Time?

20. The early Earth’s atmosphere lacked oxygen. What was responsible for the addition of oxygen to our atmosphere?

21. UV radiation is dangerous to living things. What accumulated over millions of years to block the majority of UV radiation and make land a safe place to live?

22. Which were the first organisms to live on land?

23. Later in the Precambrian time, the first eukaryotes appeared. How are eukaryotes different from prokaryotes?

24. Generally, what is Endosymbiosis?

25. What does the Endosymbiotic theory propose?

26. Why are very early animal fossils scarce?

27. Complete the following: During the Paleozoic Era, ________________ diversified, and ____________ evolved. The first ___________________ evolved. Some ___________________, and then some _______________, left the oceans to colonize the _____________.

28. What is an arthropod? Give an example.

29. What is a vertebrate? Give an example.

30. Complete the following: Reptiles, dinosaurs, and birds were the dominant animals during the _____________ Era, and ____________________ dominated the Cenozoic Era.

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download