Plate Tectonics. A Guide to Taking Cornell Notes Left side is smaller than the right side Red words go on the left (vocab words) Black words go on the.

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Presentation transcript:

Plate Tectonics

A Guide to Taking Cornell Notes Left side is smaller than the right side Red words go on the left (vocab words) Black words go on the right (definitions/explanations) Purple words do not need to be written down

Tectonic Plates Pieces of the lithosphere that move around on top of the asthenosphere Fit together like a jigsaw puzzle Move a few centimeters each year Plates float on the asthenosphere like ice in water Global Positioning Systems (GPS) are used to prove plate movement

Continental Drift The hypothesis that states that the continents once formed a single landmass, broke up and drifted to their present locations Discovered by Alfred Wegnener

Evidence of Continental Drift Continents fit together (South America and Africa) Fossils of plants and animals were found on different continents

Pangaea Continents joined as a single landmass Means “all Earth” or “all Land”

Sea-Floor Spreading The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies (becomes hard) As tectonic plates move away from each other, the sea floor spreads apart and magma fills in the gap e4U e4U

Magnetic Reversal When earth’s magnetic poles change places Proven by the magnetic reversals on the ocean floor

Plate Boundary A place where tectonic plates touch Two Tectonic plates collide Continental- Continental (two continental crust collide) Continental-Oceanic (continental and oceanic crust collide) Oceanic-Oceanic (two oceanic crust collide) Two tectonic plates separate Two tectonic plates slide past each other horizontally

Sea Floor Spreading ◦ atch?v=BHZM3CPFo_k atch?v=BHZM3CPFo_k Pangaea ◦ atch?v=gyT8Xs6Ab-k atch?v=gyT8Xs6Ab-k

Plate Tectonics Foldable Must Include: ◦ Pangaea put in order on the back (from what Pangaea looked like to the present continents ◦ Each Vocab Word ◦ Definition behind the vocab word ◦ Detailed Picture on the inside Textbook Help: Pangaea (104/105) Sea-Floor Spreading (106) Boundaries (108/109) **Index is a great resource** Sea-Floor Spreading Convergent Boundary Divergent Boundary Transform Boundary