Bellwork Clear everything off your desk except: ILL Pen or Pencil (P/P) Flip to the Vocabulary/Notes Section Label the next entry as “Continental Drift” Wait Patiently & Quietly (P&Q)

Continental Drift Vocabulary

Continental Drift Alfred Wegener’s hypothesis that the continents were once joined together and have broken or drifted apart Evidence: Fossils Climate Geology

Pangaea The supercontinent hypothesized by Wegener Means “all lands”

Mid-Ocean Ridges Huge underwater mountain ranges in the middle of the oceans

Convection Current When the hot, soft rock of the asthenosphere rises, cools and then sinks in a continuous motion

Plate Tectonics Result of Wegener’s hypothesis that the lithosphere is made up of huge plates that move over Earth’s surface

Plate Boundary Place where the edges of two plates meet Three types: Divergent Convergent Transform

Divergent Boundary Where two plates move apart Usually found under the ocean

Convergent Boundary Where two plates push together

Transform Boundary Where two plates scrape past each other

Rift Valley Formed when two plates move apart at a divergent boundary Molten rock rise to the surface to form new crust