Plate Tectonics The Puzzling Earth Plate Tectonics Theory

The “Puzzling” Earth Plate Tectonics Theory that Earth’s surface is broken into large, rigid

The “Puzzling” Earth Pangea Supercontinent that all continents were once a part of

The “Puzzling” Earth Make a list of clues you used to put together your

The “Puzzling” Earth Continental Drift Continents are in constant motion on the surface of

The “Puzzling” Earth Wegener’s 1. Evidence Climate Clues Sediments from glaciers in South America,

The “Puzzling” Earth Wegener’s 2. Evidence Fossil Clues Fossils of similar organisms found on

The “Puzzling” Earth Wegener’s 3. Evidence Rock Clues Similar rock types were found in

inside the Earth Convection Current Movement of liquid material that is heated from underneath,

Plate Boundaries Plate Boundary Transform Boundary Motion Landforms Horizontal Earthquakes sliding motion Valleys *Also

Plate Boundaries Plate Boundary Divergent Boundary Motion Landforms Plates move Ocean: midaway from each

Plate Boundaries Plate Boundary Convergent Boundary (*Subduction) Motion Landforms Plates move toward Not subducted

Plate Boundaries Plate Boundary Motion Landforms Plates move toward Mountains Convergent each other Boundary

Plate Boundaries Cookie Subduction 1. What does the cookie represent? 2. What does the

Mid-Ocean Ridges Ocean Floor Long, narrow mountains formed by magma at divergent boundaries

Ocean Floor Seafloor Spreading Process by which new oceanic crust forms along a mid-ocean

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Plate Tectonics

The “Puzzling” Earth Plate Tectonics Theory that Earth’s surface is broken into large, rigid pieces

The “Puzzling” Earth Pangea Supercontinent that all continents were once a part of

The “Puzzling” Earth

The “Puzzling” Earth Make a list of clues you used to put together your partner’s puzzle.

The “Puzzling” Earth

The “Puzzling” Earth Continental Drift Continents are in constant motion on the surface of earth Originally proposed by Wegener 100 years ago

The “Puzzling” Earth Wegener’s 1. Evidence Climate Clues Sediments from glaciers in South America, Africa, India, and Australia match those in Antarctica

The “Puzzling” Earth Wegener’s 2. Evidence Fossil Clues Fossils of similar organisms found on continents now separated by oceans

The “Puzzling” Earth Wegener’s 3. Evidence Rock Clues Similar rock types were found in mountain ranges in North America (Appalachian Mtns) and Europe (Caledonian Mtns) Similar volcanic rocks were found in Africa and South America

The “Puzzling” Earth

inside the Earth

inside the Earth Convection Current Movement of liquid material that is heated from underneath, rises and cools on top

inside the Earth

Plate Boundaries Plate Boundary Transform Boundary Motion Landforms Horizontal Earthquakes sliding motion Valleys *Also called Hills strike-slip faults

Plate Boundaries Plate Boundary Divergent Boundary Motion Landforms Plates move Ocean: midaway from each ocean ridge other Land: valley

Plate Boundaries Plate Boundary Convergent Boundary (*Subduction) Motion Landforms Plates move toward Not subducted each other plate=volcanic *One plate slides arc under the other

Plate Boundaries Plate Boundary Motion Landforms Plates move toward Mountains Convergent each other Boundary *Plates push (*No subduction) upward

Plate Boundaries Cookie Subduction 1. What does the cookie represent? 2. What does the cream filling represent? 3. What do your teeth represent? 4. What is being formed by the filling?

Mid-Ocean Ridges Ocean Floor Long, narrow mountains formed by magma at divergent boundaries on the ocean floor Forms in two ways: 1. Large amounts of lava erupt and build up around ridge 2. As lava cools it cracks, rocks in those cracks form mountain ranges

Ocean Floor Seafloor Spreading Process by which new oceanic crust forms along a mid-ocean ridge and older crust moves away from the ridge As seafloor spreads, mantle below melts and forms magma Rises through cracks

Ocean Floor