Book Work Assignment—Chapter 17

Plate Tectonics and Boundaries

Read pages 560-566, answer the following questions. Due Thursday.

1. Describe how the gap is filled when two tectonic plates move away from each other
2. Explain how magnetic bands provide evidence that tectonic plates are moving apart at mid-oceanic ridges. Approximately how often do the Earth’s magnetic poles switch?
3. Predict what type of plate boundary exists along the coastline near Japan’s volcanic mountain ridges.
4. The oldest continental rocks are 4 billion years old, whereas the oldest sea floor rocks are 200 million years old. Explain why such a difference occurs in their ages.
5. List and describe the three types of plate boundaries.
6. What is a fault? What do they indicate?
7. What are the asthenosphere and lithosphere?
8. What is convection? Explain convection currents. List another example where convection currents might play a role.
9. Take a look at the map on page 561. Identify at least 3 features of the earth that exist at plate boundaries—For example—the San Andreas fault exists at a transform boundary. (You need 3 others)
10. How is it theorized that the tectonic plates of Earth move?
11. Are rocks nearer to a divergent boundary more likely to be older or younger than those farther away? Explain your answer.
12. Pg 566 #2
13. Pg 566 #4
14. Write 5 sentences explaining how the theories of plate tectonics and continental drift fit together as one big theory.
15. In your opinion, what are the strengths and weaknesses of the above theories. Be specific, discuss evidence for AND against both. State whether or not you agree with the above theories.

Book Work Assignment—Chapter 17

Plate Tectonics and Boundaries

Read pages 560-566, answer the following questions. Due Thursday.

1. Describe how the gap is filled when two tectonic plates move away from each other
2. Explain how magnetic bands provide evidence that tectonic plates are moving apart at mid-oceanic ridges. Approximately how often do the Earth’s magnetic poles switch?
3. Predict what type of plate boundary exists along the coastline near Japan’s volcanic mountain ridges.
4. The oldest continental rocks are 4 billion years old, whereas the oldest sea floor rocks are 200 million years old. Explain why such a difference occurs in their ages.
5. List and describe the three types of plate boundaries.
6. What is a fault? What do they indicate?
7. What are the asthenosphere and lithosphere?
8. What is convection? Explain convection currents. List another example where convection currents might play a role.
9. Take a look at the map on page 561. Identify at least 3 features of the earth that exist at plate boundaries—For example—the San Andreas fault exists at a transform boundary. (You need 3 others)
10. How is it theorized that the tectonic plates of Earth move?
11. Are rocks nearer to a divergent boundary more likely to be older or younger than those farther away? Explain your answer.
12. Pg 566 #2
13. Pg 566 #4
14. Write 5 sentences explaining how the theories of plate tectonics and continental drift fit together as one big theory.
15. In your opinion, what are the strengths and weaknesses of the above theories. Be specific, discuss evidence for AND against both. State whether or not you agree with the above theories.