Plate 8 th Grade Science With the marvelous Mr. Christine Tectonics.

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Presentation transcript:

Plate 8 th Grade Science With the marvelous Mr. Christine Tectonics

What is Plate Tectonics? Remember what a theory was? –A scientific Theory is a well tested concept that explains many observations. So, the Theory of Plate Tectonics is … –Pieces of the Earth’s Lithosphere are in slow, constant motion, driven by convection currents in the mantle.

Remember the Interior of the Earth or else …

What a full plate

What is a plate? A plate is a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of oceanic and continental crust.

Remember Convection The transfer of heat by movement of a fluid. This causes plate movement

Plate Boundaries The Earth is broken up into many plates So, the plates meet at areas called boundaries Plate Boundaries: Where edges of world’s plates meet. 3 types –D–Divergent, Convergent, and Transform

Divergent Boundary Divergent Boundary: Place where two plates move apart or diverge. Ocean = Mid Ocean Ridge Land = Rift Valley

Divergent Boundary

Convergent Boundary Convergent Boundary: Place where two plates come together or converge and collide. Remember Subduction?

Convergent Boundary

Transform Boundary Transform Boundary: Place where two plates slip past each other moving in opposite directions. Earthquakes occur but no crust is destroyed

San Andreas Fault (Transform)

All Boundaries

Pangea to Future