Keep up & fill in the answers Test Review Plate Tectonics

Continental Drift States that continents have moved slowly to their current locations

Watch plate boundaries I worked hard On these graphics

Pangaea All continent once connected together

Wegner’s Evidence for continental drift Fossils Rocks Climate clues

Seafloor Spreading Harry Hess provided the theory that plates were spreading apart in the middle of the ocean How did this help Wegner’s theory?

Magnetic Reversal Rocks discovered at the bottom of the ocean contained iron bearing minerals Reversals were recorded in the solidified rocks

Lithosphere Contains the crust & the upper mantle

Asthenosphere A plastic like layer that the plates float around on

Convergent boundaries Plates move together

Divergent Boundary Plates move apart

Transform Boundaries Plates slide past each other

Convection Currents The heating, rising, cooling, and sinking of material inside of earth It IS the driving force behind plate tectonics

Earthquakes Mostly occur along transform boundaries Does that mean they can’t happen any where else???? San Andreas California contains the most commonly know transform fault for us

Mountain Building Did you see towel experiment in the video? This happens when 2 continental plates collide

Looking Ahead Earthquakes & tsunamis tsunamis

Why study rocks Clues? Predictions? Evidence? Rock Cycle