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Divergent Plate Boundaries.pptx
- 1. Welcome! Science 10 FLEX Camiguin Prepared by: Jelannie R. Arnol 1
- 2. 2 Whiteboard Review Rules 1. Read the question and write your answer on your whiteboard. 2. You may use your notes, not your other classmates to answer the question. 3. Do not show your board until I say so. 4. Ready? Let’s go!
- 3. “ Question #1: At convergent boundaries, Earth’s plates are _______: A. Not moving. B. Moving towards each other. C. Moving away from each other. D. Being created. 3
- 4. ◍ Question #1 Answer: B. Moving towards each other. Convergence of the Nazca and South American Plates https://pubs.usgs.gov/publications/text/Nazca.html
- 5. “ ◍ Question #2: When two plates collide, the heavier of the two is pulled under the lighter plate in a process called ______: 5
- 6. ◍ Question #2 Answer: Subduction! https://pubs.usgs.gov/gip/dynamic/graphics/Fig21oceancont.gif
- 7. “ ◍ Question #3: What are the three types of Convergent Plate Boundaries found on Earth? 7
- 8. “ ◍ Question #3 Answer: ◍ Oceanic-Continental Convergence ◍ Oceanic-Oceanic Convergence ◍ Continental-Continental Convergence 8
- 10. “ ◍ Question #4 : What type of Convergent Plate boundary where in one of the plates such as oceanic crust and Lithospheric mantle is pushed, or subducted, under the other forming a subduction zone 10
- 11. “ ◍ Question #4: Oceanic-Oceanic Convergent Plate Boundary 11
- 12. “ ◍ Question #5: It is produced when two tectonic plates colliding towards each other. 12
- 13. “ ◍ Question #5 Answer: Convergent Plate Boundaries 13
- 15. Today’s Learning Objectives: ◍ Explain Divergent Boundaries and their features. ◍ Identify the two types of divergent plate boundaries ◍ Determine the movement of the two types of divergent plate 15
- 16. Divergent boundaries ◍ where plates separate and move in opposite directions, allowing new lithosphere to form from upwelling magma. 16 ◍ This either occurs at mid-ocean ridges (the so-called seafloor spreading) or at rifted continental margins.
- 17. 1. Transition headline Let’s start with the first set of slides 17
- 18. 1. Transition headline Let’s start with the first set of slides 18 Along these boundaries , earthquakes are common & magma ( molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust.
- 19. Questions ◍ The motion of divergent plate boundary is spreading. ◍ Volcanic activity is present in divergent boundary. ◍ Oceanic lithosphere is formed in divergent plate boundary. 19 (Seafloor Spreading)
- 21. Two Types of Divergent Plate Boundaries 21 ◍ Oceanic-Oceanic Plates ◍ Continental-Continental Plates
- 22. Divergent Boundaries – Oceanic Plates ◍ Oceanic ridges are the result or rising convection currents that lifts the lithosphere. 22
- 23. Divergent Boundaries – Continental Plates ◍ Continental rifts are the result of the convection forces inside the Earth arching the plate upwards and fracturing it. 23
- 24. 24 Divergent boundaries occur where two oceanic plates move away from one another, this is where seafloor spreading takes place the most common example is the mid-ocean ridge. Fig.1.1. Oceanic- oceanic Fig.1.2. Continental - continental
- 25. What is being produced from the types of divergent plate boundaries shown below? 25 Oceanic –oceanic Continental- continental Mid-Atlantic ocean ridge Volcanic activity Shallow earthquake faulted valleys - rift valleys
- 26. What causes the motion in the two types of divergent plate boundaries ? Divergent boundaries occur along spreading centers where plates are moving apart & new crust is created by magma pushing up from the mantle. 26
- 27. 27 True/False – Thumbs Up/Thumbs Down For each of the following statements, put your thumb up or down depending on if it is true or false. TRUE = THUMBS UP FALSE = THUMBS DOWN
- 28. 28 True/False – Thumbs Up/Thumbs Down A divergent boundary happens when Earth’s tectonic plates move away from each other TRUE = THUMBS UP FALSE = THUMBS DOWN
- 29. 29 True/False – Thumbs Up/Thumbs Down A divergent boundary happens when Earth’s tectonic plates move away from each other TRUE = THUMBS UP FALSE = THUMBS DOWN 1 2 3 4 5
- 30. 30
- 31. 31 True/False – Thumbs Up/Thumbs Down Ocean ridge and volcanic island are also formed in the divergent plate boundary. TRUE = THUMBS UP FALSE = THUMBS DOWN
- 32. 32 True/False – Thumbs Up/Thumbs Down Ocean ridge and volcanic island are also formed in the divergent plate boundary. TRUE = THUMBS UP FALSE = THUMBS DOWN 1 2 3 4 5
- 33. 33
- 34. 34 True/False – Thumbs Up/Thumbs Down When magma continues to build up, new mountain ranges are not formed under the sea creating a mid-ocean ridge. TRUE = THUMBS UP FALSE = THUMBS DOWN
- 35. 35 True/False – Thumbs Up/Thumbs Down When magma continues to build up, new mountain ranges are not formed under the sea creating a mid-ocean ridge. TRUE = THUMBS UP FALSE = THUMBS DOWN 1 2 3 4 5
- 36. 36
- 37. 37 True/False – Thumbs Up/Thumbs Down Earthquakes and volcanoes do not occur in a divergent plate boundary. TRUE = THUMBS UP FALSE = THUMBS DOWN
- 38. 38 True/False – Thumbs Up/Thumbs Down Earthquakes and volcanoes do not occur in a divergent plate boundary. TRUE = THUMBS UP FALSE = THUMBS DOWN 1 2 3 4 5
- 39. 39
- 40. 40 True/False – Thumbs Up/Thumbs Down Volcanic activity is present in divergent boundary. TRUE = THUMBS UP FALSE = THUMBS DOWN
- 41. 41 True/False – Thumbs Up/Thumbs Down Volcanic activity is present in divergent boundary. TRUE = THUMBS UP FALSE = THUMBS DOWN 1 2 3 4 5
- 42. 42
- 43. 43 True/False – Thumbs Up/Thumbs Down The motion of divergent plate boundary is spreading. TRUE = THUMBS UP FALSE = THUMBS DOWN
- 44. 44 True/False – Thumbs Up/Thumbs Down The motion of divergent plate boundary is spreading. TRUE = THUMBS UP FALSE = THUMBS DOWN 1 2 3 4 5
- 45. 45
- 46. 46 True/False – Thumbs Up/Thumbs Down Plates that are sliding past each other is characterized by a transform fault boundary. TRUE = THUMBS UP FALSE = THUMBS DOWN
- 47. 47 True/False – Thumbs Up/Thumbs Down Plates that are sliding past each other is characterized by a transform fault boundary. TRUE = THUMBS UP FALSE = THUMBS DOWN 1 2 3 4 5
- 48. 48
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- 51. 51 1 2 3 4 5
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