The Theory of Plate The Theory of Plate TectonicsTectonics

Plate Tectonics Power PointPlate Tectonics Power Point Unit B: The Dynamic Unit B: The Dynamic EarthEarth

Learning Target:

4b) Compare and contrast (movement, location, landforms, specific examples) the three major types of plate boundaries. (DOK2)

Essential QuestionEssential Question

What are the different types of plate What are the different types of plate boundaries and how do they impact us and boundaries and how do they impact us and

the Earth?the Earth?

VocabularyVocabulary

Plate:Plate: A section of the lithosphere that slowly A section of the lithosphere that slowly

moves over the asthenosphere, carrying moves over the asthenosphere, carrying pieces of continental and oceanic crust.pieces of continental and oceanic crust.

Plate Tectonics:Plate Tectonics: The theory that pieces of Earth’s lithosphere The theory that pieces of Earth’s lithosphere

are in constant motion, driven by convection are in constant motion, driven by convection currents in the mantle.currents in the mantle.

VocabularyVocabulary

Plate BoundaryPlate Boundary Where two plates meetWhere two plates meet

Fault:Fault: A break in Earth’s crust where slabs of rock A break in Earth’s crust where slabs of rock

slip past each other.slip past each other.

Rift Valley:Rift Valley: A deep valley that forms where two plates A deep valley that forms where two plates

move apart.move apart.

TYPE OF BOUNDARY SKETCH

DIRECTION OF

MOVEMENT(show

arrows)

ASSOCIATED LANDFORMSREAL-WORLD

EXAMPLES

Divergent

     

     

Transform-Fault

      

     

Convergent(Collision)

 Continent -Continent

      

     

Convergent(Subduction)

 Ocean-Continent

      

     

Convergent(Subduction)

 Ocean- Ocean

     

     

Plate BoundariesPlate Boundaries

The lithosphere is broken into separate The lithosphere is broken into separate sections called __________.sections called __________.

True or False: Plates can carry True or False: Plates can carry continents or parts of the ocean floor but continents or parts of the ocean floor but not both.not both. FalseFalse

plates

Divergent BoundariesDivergent Boundaries

Convergent BoundariesConvergent Boundaries

Ocean-Ocean ConvergenceOcean-Continent Convergence

Continent-Continent Convergence

Transform BoundaryTransform Boundary

A Theory of Plate MotionA Theory of Plate Motion

Pieces of Earth’s lithosphere are in Pieces of Earth’s lithosphere are in constant, slow motion, driven by constant, slow motion, driven by convection currents in the mantle.convection currents in the mantle.

True or False: The theory of plate tectonics True or False: The theory of plate tectonics explains the formation, movement, and explains the formation, movement, and subduction of Earth’s plates.subduction of Earth’s plates. TrueTrue

Plate BoundariesPlate Boundaries

True or False: Crust is both created and True or False: Crust is both created and destroyed along a transform boundary.destroyed along a transform boundary. FalseFalse

Most divergent boundaries occur at the Most divergent boundaries occur at the ________________.________________.

The density of the plate determines The density of the plate determines which plate comes out on top.which plate comes out on top.

mid-ocean ridge

The Continent’s Slow The Continent’s Slow DanceDance

Plates move from about one to ten Plates move from about one to ten centimeters per year.centimeters per year.

True or False: The pieces of the super True or False: The pieces of the super continent Pangaea began to drift apart continent Pangaea began to drift apart about 225 million years ago.about 225 million years ago. True True

Check for UnderstandingCheck for Understanding

Describe the theory of plate tectonics and Describe the theory of plate tectonics and the major types of plate boundaries. the major types of plate boundaries.