Unit 3 Target 1. I can explain the evidence for continental drift.
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1 Unit 3 Target 1 I can explain the evidence for continental drift.
2 Question? Look at the map below, do you see any puzzle pieces, if so where would they fit? Copyright 2010 Ryan P. Murphy
3 Possible Answers! Copyright 2010 Ryan P. Murphy
4 Copyright 2010 Ryan P. Murphy
5 Copyright 2010 Ryan P. Murphy
6 Copyright 2010 Ryan P. Murphy
7 Copyright 2010 Ryan P. Murphy
8 Copyright 2010 Ryan P. Murphy
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10 Area of Focus: Plate Tectonics Copyright 2010 Ryan P. Murphy
11 Plate tectonics: The earth s crust and upper mantle are broken into sections called plates. - Copyright 2010 Ryan P. Murphy
12 Plate tectonics: The earth s crust and upper mantle are broken into sections called plates. These plates float on the mantle like rafts (moving very slowly) Copyright 2010 Ryan P. Murphy
13 There are 8 primary plates and several more secondary plates that make up the earth s landmass.
14 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
15 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
16 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
17 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
18 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
19 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
20 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
21 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
22 African Plate, Antarctic Plate, Australian Plate, Eurasian Plate, Indian Plate, North American Plate, Pacific Plate, South American Plate.
23 The speed at which the plates move is about the speed at which your fingernails grow. Copyright 2010 Ryan P. Murphy
24 Copyright 2010 Ryan P. Murphy The speed at which the plates move is about the speed at which your fingernails grow. Slowest They are all slow
25 Copyright 2010 Ryan P. Murphy The speed at which the plates move is about the speed at which your fingernails grow. Slowest They are all slow The African Plate's speed is estimated at around 2.15 cm (0.85 in) per year
26 Copyright 2010 Ryan P. Murphy The speed at which the plates move is about the speed at which your fingernails grow. Fastest
27 Copyright 2010 Ryan P. Murphy The speed at which the plates move is about the speed at which your fingernails grow. Fastest Tonga Microplate Samoa 24 cm (9.4 inches) a year.
28 Copyright 2010 Ryan P. Murphy The speed at which the plates move is about the speed at which your fingernails grow. The yearly distance traveled varies from plate to plate. Some move at 3 centimeters while other's move around 6 cm per Fastest Tonga Microplate Samoa 24 cm (9.4 inches) a year.
29 Continental Drift: The gradual movement of the continents across the earth. Copyright 2010 Ryan P. Murphy
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31 Video! Plate Tectonics.
32 In 1912, The German geologist Alfred Wegener proposed continental drift. Copyright 2010 Ryan P. Murphy
33 Copyright 2010 Ryan P. Murphy In 1912, The German geologist Alfred Wegener proposed continental drift. I say. Africa and South America fit strangely like two puzzle pieces.
34 In 1912, The German geologist Alfred Wegener proposed continental drift. Not accepted until the 1950 s! Copyright 2010 Ryan P. Murphy
35 Evidence for continental drift Copyright 2010 Ryan P. Murphy
36 The shapes match. Copyright 2010 Ryan P. Murphy
37 Same fossils found on different continents Copyright 2010 Ryan P. Murphy
38 Same fossils found on different continents These are the pictures on the puzzle pieces. Copyright 2010 Ryan P. Murphy
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41 The same rock structures on different continents Copyright 2010 Ryan P. Murphy
42 Example
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44 Whoa A time machine!. I m going back 50 million years.
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51 Fossils of plants and animals on Antarctica Copyright 2010 Ryan P. Murphy
52 Magnetic layers in sea floor spreading Copyright 2010 Ryan P. Murphy
53 Magnetic layers in sea floor spreading Copyright 2010 Ryan P. Murphy
54 Magnetic layers in sea floor spreading Copyright 2010 Ryan P. Murphy
55 Magnetic layers in sea floor spreading Copyright 2010 Ryan P. Murphy
56 Magnetic layers in sea floor spreading Copyright 2010 Ryan P. Murphy
57 Copyright 2010 Ryan P. Murphy Magnetic layers in sea floor spreading Oldest Oldest
58 The magnetic poles can shift fairly suddenly on this planet. Right now, North is in the Arctic, the North Pole could shift to someplace else. Copyright 2010 Ryan P. Murphy
59 The magnetic poles can shift fairly suddenly on this planet. Right now, North is in the Arctic, the North Pole could shift to someplace else. Copyright 2010 Ryan P. Murphy
60 The magnetic poles can shift fairly suddenly on this planet. Right now, North is in the Arctic, the North Pole could shift to someplace else. Copyright 2010 Ryan P. Murphy
61 Iron within cooling molten rock orients itself to the poles before hardening. Copyright 2010 Ryan P. Murphy
62 Iron within cooling molten rock orients itself to the poles before hardening. The ocean floor shows evidence of a changing magnetic field, and sea-floor spreading. Copyright 2010 Ryan P. Murphy
63 Iron within cooling molten rock orients itself to the poles before hardening. The ocean floor shows evidence of a changing magnetic field, and sea-floor spreading. Copyright 2010 Ryan P. Murphy
64 Note how the oceanic plates are much older the further they are from the mid-atlantic ridge.
65 180 Million Years Old
66 180 Million Years Old 10 Million
67 You can now complete this question in your notes.
68 800 million years before Pangea, the continents were together in the supercontinent Rodinia.
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74 Climatic changes created a snowball earth where the entire planet was covered in a mile thick of ice.
75 Climatic changes created a snowball earth where the entire planet was covered in a mile thick of ice. (Mass extinction of ocean life)
76 Climatic changes created a snowball earth where the entire planet was covered in a mile thick of ice. (Mass extinction of ocean life)
77 Copyright 2010 Ryan P. Murphy Behold the Supercontinent! Pangea?
78 Pangea: The Supercontinent - Copyright 2010 Ryan P. Murphy
79 Pangea: The Supercontinent All of the plates were once together. Copyright 2010 Ryan P. Murphy
80 Pangea: The Supercontinent All of the plates were once together. Copyright 2010 Ryan P. Murphy
81 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
82 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
83 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
84 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
85 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
86 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
87 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
88 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
89 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
90 Gondwondaland and Laurasia were two mega continents before Pangea. Copyright 2010 Ryan P. Murphy
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93 Future Supercontinent 250 million years from now.
94 Future Supercontinent 250 million years from now. Lets officially name the new Supercontinent before everyone else Each group gets to come up with one name to share and then we will vote.
95 Future Supercontinent 250 million years from now. Lets officially name the new Supercontinent before everyone else Each group gets to come up with one name to share and then we will vote. Update: It already has a name
96 Future Supercontinent 250 million years from now. Lets officially name the new Supercontinent before everyone else Each group gets to come up with one name to share and then we will vote. Update: It already has a name The name is
97 Future Supercontinent 250 million years from now. Lets officially name the new Supercontinent before everyone else Each group gets to come up with one name to share and then we will vote. Update: It already has a name The name is Amasia
98 You can now complete this question in your notes.
99 What causes continental drift and plate tectonics? Copyright 2010 Ryan P. Murphy
100 Answer! Convection currents (Remember heat rises) move the plates Copyright 2010 Ryan P. Murphy
101 Answer! Convection currents (Remember heat rises) move the plates Copyright 2010 Ryan P. Murphy
102 Answer! Convection currents (Remember heat rises) move the plates Copyright 2010 Ryan P. Murphy
103 Answer! Convection currents (Remember heat rises) move the plates Copyright 2010 Ryan P. Murphy
104 Which colored arrows are incorrect based on the convection current patterns and plate movements below? Copyright 2010 Ryan P. Murphy
105 Answer! The blue arrows. The plates should be moving toward each other. Copyright 2010 Ryan P. Murphy
106 Answer! The blue arrows. The plates should be moving toward each other. Copyright 2010 Ryan P. Murphy
107 Oh-no! We are trying it again.
108 Try Again! Which colored arrows are incorrect based on the convection current patterns and plate movements below? Copyright 2010 Ryan P. Murphy
109 Answer! The purple arrows should be diverging instead of converging. Copyright 2010 Ryan P. Murphy
110 Answer! The purple arrows should be diverging instead of converging. Copyright 2010 Ryan P. Murphy
111 Oh-no! We are trying it one more time.
112 Try Again! Which colored arrows are incorrect based on the convection current patterns and plate movements below? Copyright 2010 Ryan P. Murphy
113 Answer! The light blue arrows should be diverging instead of converging. Copyright 2010 Ryan P. Murphy
114 Answer! The light blue arrows should be diverging instead of converging. Copyright 2010 Ryan P. Murphy
115 Oh-no! We are trying it one more time.
116 Try Again! Which colored arrows are the only correct ones in the entire group. Copyright 2010 Ryan P. Murphy
117 Try Again! Which colored arrows are the only correct ones in the entire group. Copyright 2010 Ryan P. Murphy
118 Oh-No! He s Dead.
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