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Plate Tectonics Day 2. Just for fun Scrat and Continental Drift-Ice Age 4 Pangaea’s Moving Farther Apart Again Song The Continental Drift Song (Breaking Up Is Hard to Do). Review. Plate tectonic Theory Pangaea-one big continent Proof-fossils, geology, and climate
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Plate Tectonics Day 2 • Just for fun Scrat and Continental Drift-Ice Age 4 • Pangaea’s Moving Farther Apart Again Song • The Continental Drift Song (Breaking Up Is Hard to Do)
Review Plate tectonic Theory Pangaea-one big continent Proof-fossils, geology, and climate http://www.odsn.de/odsn/services/paleomap/animation.html • Surface of earth made of rigid “plates” • Float on asthenosphere and is in constant motion • Explains Drifting continents Mountain building Earthquakes Volcanic activity
Constructive ForcesHelp build land There are 3Types of Boundaries And 1 undifined Click picture for video http://www.learner.org/interactives/dynamicearth/plate.html
Divergent Boundaries http://www.learner.org/interactives/dynamicearth/slip3.html • Boundary between two plates that are moving apart or rifting • RIFTING causesSEAFLOOR SPREADING
Pull Apart platessplit; hot molten rock from the mantle rises, cools and causes the floor to spread. Ex. The Mid-Atlantic Ridge
Divergent Boundary Iceland Divided
Convergent Boundarieshttp://www.learner.org/interactives/dynamicearth/slip2.html • Boundaries between two plates that are colliding
Collide platescrash into one another and form mountains over millions of years. Ex. The Himalayas
Convergent Boundaries Himalayas
Subductionhttp://www.learner.org/interactives/dynamicearth/slip2.htmlSubductionhttp://www.learner.org/interactives/dynamicearth/slip2.html oceanic plates collide with continental plates, and slide beneath them creating trenches. Ex. Mt. St. Helens