Plate tectonics review

1. Plate tectonics review

2. The ____________ is (are) an example of a transform boundary. Appalachian Mountains San Andreas Fault Mid-Atlantic Ridge Himalaya Question 1

3. San Andreas Fault Answer 1

4. On which of Earth’s layers do we live? Question 2

5. the crust Answer 2

6. Which geologic feature was most likely formed when two lithospheric plates collided? Grand Canyon Lake Michigan Sierra Madre mountain range Mississippi River delta Question 3

7. Sierra Madre mountain range Answer 3

8. Where can the result of plate movement be seen? Question 4

9. at plate boundaries Answer 4

10. The Great Rift Valley in Africa is a ________ boundary. Question 5

11. divergent Answer 5

12. Question 6 • Which layer of the Earth is made mostly of liquid metal?

13. layer 3 Answer 6

14. Plates slide past one another at ________ boundaries. Question 7

15. transform Answer 7

16. The Himalaya Mountains formed from a collision of the Indo-Australian plate with the Eurasion plate. Which best approximates the rate of movement of the Indo-Australian plate? 0.67 mm per year 6.7 cm per year 6.7 meters per year 67 meters per year Question 8

17. 6.7 cm per year Answer 8

18. The thickest layer of the Earth contains about 80% of the volume of Earth. What is this layer? Question 9

19. the mantle Answer 9

20. Plates move apart at __________ boundaries. Question 10

21. divergent Answer 10

22. The crust and upper mantle make up Earth’s _________________. Question 11

23. lithosphere Answer 11

24. Question 12 • Scientists theorize that millions of years ago South America and Africa formed a single land mass.

25. Which statement best describes why South America and Africa are now thousands of miles apart? Strong winds continually pushed the land masses away from each other. Ocean currents carried some land masses east and some west. Lithospheric plates moved the continents apart at a rate of centimeters per year Tectonic plates slid together forming mountains that forced the continents apart. Question 12

26. Lithospheric plates moved the continents apart at a rate of centimeters per year Answer 12

27. The Andes Mountains of South America were gradually formed when the Nazca and South American tectonic plates collided. Which of these caused this collision? movement of the material in Earth’s core changes in Earth’s magnetic field convection currents in the Earth’s mantle volcanic activity in the Earth’s crust Question 13

28. convection currents in Earth’s mantle Answer 13

29. Which layer of Earth is composed mainly of liquid water and different types of rock crystals such as quartz? Question 14

30. the crust Answer 14

31. Which is the best description of where earthquakes are likely to occur? along a coastline in the middle of an ocean in the middle of a continent along two plate boundaries Question 15

32. along two plate boundaries Answer 15

33. Scientists place devices for communicating with satellites on the edge of continents. Two devices were placed on continents where lithospheric plates are moving apart. If these lithospheric plates are moving at a typical rate, about how much farther apart from each other will the devices be in 10 years? 1 cm, 100 cm, 10 m, or 1 km Question 16

34. 100 centimeters Answer 16

35. Active volcanoes are most likely to form at ______________. the center of continents convergent oceanic-continental boundaries transform boundaries divergent boundaries Question 17

36. convergent oceanic-continental boundaries Answer 17

37. The thinnest layer of the Earth ranges in thickness between 7 kilometers and 70 kilometers. Which layer is being described? Question 18

38. the crust Answer 18

39. Scientists have observed that the plates move at rates ranging from 1 cm to 12 cm per __________. Question 19

40. year Answer 19

41. _______________ are formed when two continental plates collide. Question 20

42. mountain ranges Answer 20

43. Which of these best describes the composition of the inner core of Earth? solid iron and nickel liquid iron and nickel carbon dioxide and ice quartz and oxygen Question 21

44. solid iron and nickel Answer 21

45. The boundary between two plates moving together is called a _____________ boundary. Question 22

46. convergent Answer 22

47. Scientists theorize that the Atlantic Ocean is slowly increasing in width. Which is the best approximation of the rate at which lithospheric plates beneath the Atlantic Ocean are moving? 2 mm per year 2 cm per year 2 meters per year 2 km per year Question 23

48. 2 centimeters per year Answer 23