Edible Plate Tectonics You all get one Oreo. Don’t eat it yet! Don’t do anything with it yet, just look at it with amazement, because what you are looking.

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Presentation transcript:

Edible Plate Tectonics You all get one Oreo. Don’t eat it yet! Don’t do anything with it yet, just look at it with amazement, because what you are looking at is….. The earth!

TECTONICS: From the Greek “tecton” builder architect The study of large features on Earth’s surface and the processes that formed them.

PLATE TECTONICS: Large features… continents ocean basins mountain ranges and processes… earthquakes volcanic eruptions due to movement of plates of Earth’s outer shell.

Cracked Egg Shell!

Parks and Plates ©2002 Robert J. Lillie

Oreo plate tectonics These four plate tectonic processes shape the earth and its landscapes in different ways: Divergent plate boundaries Transform plate boundaries Hot spots

Now…. carefully remove the top biscuit WITHOUT BREAKING IT! Once it is removed, you have to break it IN HALF. Try to make the two halves similar in size.

DIVERGENT Plate Boundary: Seafloor Spreading

Divergent Plate Boundary Parks and Plates ©2002 Robert J. Lillie

DIVERGENT Plate Boundary: Seafloor Spreading

Seafloor Spreading & Plate Tectonics New ocean basins form from volcanism Ocean floor forms IN BETWEEN pieces that have split SEAFLOOR SPREADING

Convergent Plate Boundary

CONVERGENT Plate Boundary

Transform Plate Boundary Parks and Plates ©2002 Robert J. Lillie

North American Plate Pacific Plate

North American Plate Pacific Plate 5 cm/year x 100 years = 5 metres per century

Parks and Plates ©2002 Robert J. Lillie Hot Spot

 14,000 feet Mauna Kea  14,000 feet Mauna Loa

14,000 feet above sea level TALLER THAN MOUNT EVEREST! 18,000 ft below sea level

Divergent Plate Boundary: Seafloor Spreading Parks and Plates ©2002 Robert J. Lillie

Parks and Plates ©2002 Robert J. Lillie Convergent Plate Boundary: Subduction

Transform Plate Boundary: Transform (Strike-Slip) Faulting Parks and Plates ©2002 Robert J. Lillie

Parks and Plates ©2002 Robert J. Lillie Hot Spot: Plate Interior

Name the four processes! Which four plate tectonic processes shape the earth?