Earth Science Honors
Name ___________________________
Plate Tectonics- Intermediate
Block _______
Sheet #2 Parts 4-6
1. What is the major source of energy for the movement of Earth’s outer shell?
2. _______ How many major layers does the Earth’s interior have?
3. At the center is the _________ _________, a solid, _________ rich sphere having a diameter of
______________ km or ________________ mi.
4. Surrounding the inner core is the _________ ________, a fluid _____________ layer some
_______________ km or ________________miles thick.
Click on the shovel towards the lower right of the main diagram on screen 95. This will take a closer look,
or “dig a little deeper” and go into more detail.
5. How does this screen show the Earth’s magnetic field is generated?
6. Beyond the outer core is the _____________, a solid __________ layer having a thickness of
____________ km or _____________ miles.
7. (97) What percent of Earth’s volume is contained within the mantle?
8. (97) Describe what the “rocks” of the mantle are composed of.
9. The outer most layer is the _______________, a very thin outer skin that ranges from _______ to more
that __________ km thick. ( __________ to ______________ miles thick)
10. What are the two divisions of the crust?
1.
PT Sheet 2 Parts 4-6
2.
Page 1
11. In most regions, the continental crust is _______ km (______ miles) thick, but may exceed ________ km
(_________ miles) in areas of prominent mountains.
12. ________________ One of the most common continental igneous rocks.
13. Compared to continental crust, oceanic crust if quite ______________, averaging only __________ km or
about _____________ miles in thickness.
14. ________________ The igneous rock found in oceanic crust.
15. On screen 104, above the diagram, what is used to explain how continental crust floats higher that
oceanic crust?
16. What are the other two divisions of the Earth’s interior?
1.
2.
17. The asthenosphere is located within the __________ ____________, between depths of _________ to
___________ km… next screen… and is composed of hot, rocky material that is capable of
______________ ___________ _____________.
18. The lithosphere includes the upper most _____________ and the _______________ overlying , and
behaves as a _________________, _____________ layer.
19. Scientists have discovered that the weak rock within the ___________________ allows the Earth’s rigid
outer shell (_____________________) to move.
Complete the computer review questions on screens 112-119. You may see them again…..
#5 New Evidence: Mapping the Ocean Floor
20. __________ Percent of Earth covered by ocean.
21. When did your knowledge of the diverse topography of the ocean floor grow rapidly?
PT Sheet 2 Parts 4-6
Page 2
22. How does an echo sounder determine water depth?
23. _______________________ The speed of sound in water?
Use the date given and the calculator to answer screens 125-130.
24. (135) Name the three broad zones of the ocean floor.
1.
2.
3.
25. Use screens 136-138 to help describe the continental shelf.
26. Use screens 139-140 to help describe the continental slope.
27. Use screens 142-143 to help describe a deep ocean trench?
28. (144) In addition, trenches parallel regions that have chains of ___________ _________________.
29. Use screens 145-146 to describe the ocean basin.
30. What is a seamount?
31. The oceanic ridge system is the ______________ topographic feature on Earth’s surface, exceeding
_________________ km or ________________ miles in length.
32. What is a rift valley?
33. What are black smokers?
PT Sheet 2 Parts 4-6
Page 3
Answer the computer review questions… You may see some of these again.
#6 Plate Tectonics: A Scientific Revolution Unfolds
Read and review screen s 162-167
34. What are plates?
35. List the 7 major lithospheric plates.
1.
5.
2.
6.
3.
7.
4.
36. Which is the largest plate?
37. Notice that most of the large plates include an entire ____________________ plus large areas of
_________________ _______________.
38. Name the 7 intermediate sized plates.
1.
5.
2.
6.
3.
7.
4.
Complete the interactive part of screen 173.
39. Each plate is in _______________ ____________________ relative to all other plates.
40. Where does most interaction occur at?
41. (177) What three things, for example, are likely to occur at plate boundaries?
1.
PT Sheet 2 Parts 4-6
2.
3.
Page 4
42. _____________ Number of types of plate boundaries.
43. __________________ Plate boundary that occurs when 2 plates move apart.
44. __________________ Plate boundary that occurs when 2 plates move together.
45. __________________ Plate boundary that occurs when 2 plates grind past each other.
Answer computer review questions from screen 186-197. You may see these again….
PT Sheet 2 Parts 4-6
Page 5