Tectonic Plates Made of the Lithosphere Oceanic Crust -Dense -(tightly packed) -Made of Iron, and Magnesium Continental Crust -Less dense -Made mainly Of Silica Which consist of the -Upper Mantle -Crust Evidence by Plate Boundaries Which are - Difficult to see -Often identified by -Earthquakes in the area -Volcanic activity in the area 3 types of boundaries Divergent -Move apart -Evidence is rift valleys Convergent -Come together -Evidence is -Volcanic activity -Huge mountains -islands Transform -Slide past each other -Evidence is offset land and water (knife through frosting) Blocks of the lithosphere that carry the oceans and continents. Sometimes resembling the continents they carry but NOT always.

Tectonic Plates Made of the Lithosphere Oceanic Crust -Dense -(tightly packed) -Made of Iron, and Magnesium Continental Crust -Less dense -Made mainly of Silica Which consist of the -Upper Mantle -Crust Blocks of the lithosphere that carry the oceans and continents. Sometimes resembling the continents they carry but NOT always.

Tectonic Plates Evidence by Plate Boundaries Which are - Difficult to see -Often identified by -Earthquakes in the area Volcanic activity in the area Blocks of the lithosphere that carry the oceans and continents. Sometimes resembling the continents they carry but NOT always.

Tectonic Plates 3 types of boundaries Divergent -Move apart -Evidence is rift valleys Convergent -Come together -Evidence is -Volcanic activity -Huge mountains -islands Transform -Slide past each other -Evidence is offset land and water (knife through frosting) Blocks of the lithosphere that carry the oceans and continents. Sometimes resembling the continents they carry but NOT always.

Tectonic Plates Made of the Which consist of the Evidence by Which are

Plate Tectonics Is the theory that explains why and how continents move and is The study of the formation of features in Earth’s crust. What is it? Made of the lithosphere (crust and upper mantle) Is broken into Tectonic plates That ride on the Asthenosphere (layer of plastic Rock, lower mantle) Evidence (Theory of Cont’l Drift Pangea (super continent) -Continents fit like Pieces of a puzzle -Rocks -Fossils -Climatic Evidence -Glaciers -fossils Why it occurs Seafloor Spreading at Mid-ocean ridges (under water mountains) Evidence is provided In the rocks at the ridges -Thinner at ridge -Younger at ridge -Magnetic symmetry Energy sources Provided by movement Convection currents Warm cool Ridge push -Rocks oozes until Solid then like a domino Slab Pull -Sinking lithosphere takes everything with it Like a table cloth

Plate Tectonics

Is the theory that explains why and how continents move and is The study of the formation of features in Earth’s crust. What is it? Made of the lithosphere (crust and upper mantle) Is broken into Tectonic plates That ride on the Asthenosphere (layer of plastic rock, lower mantle)

Plate Tectonics Is the theory that explains why and how continents move and is The study of the formation of features in Earth’s crust. Evidence (Theory of Continental Drift) Pangea (super continent) -Continents fit like pieces of a puzzle -Rocks -Fossils -Climatic Evidence -Glaciers -Fossils

Plate Tectonics Is the theory that explains why and how continents move and is The study of the formation of features in Earth’s crust. Why it occurs Seafloor Spreading at Mid-ocean ridges (under water mountains) Evidence is provided In the rocks at the ridges Thinner at ridge -Younger at ridge -Magnetic symmetry

Plate Tectonics Is the theory that explains why and how continents move and is The study of the formation of features in Earth’s crust. Energy provided by movement Convection currents Warm cool Ridge push -Rocks oozes until Solid then like a domino Slab Pull -Sinking lithosphere takes everything with it Like a table cloth