CH 25 Flashcards
Mountain ranges on the seafloor separated by valleys.
mid-Ocean ridge
A long, narrow depression forms in between peaks along the mid-ocean ridge.
Rift Valley
The boundary where two plates collide
convergent plate boundary
the denser plate dives beneath the continent
subduction
boundary between two plates that are moving apart
divergent plate boundary
boundary where plates slide horizontally past each other in opposite directions
transform plate boundary
the sudden movement or vibration of the ground that occurs when rocks slip
earthquake
a crack in earths crust along which rock has moved
fault
sudden release of strain energy as rock moves along a fault
elastic rebound
point of origin for an earthquake
focus
point on earths surface directly above the focus
epicenter
who came up with the continental drift hypothesis
Alfred Wegener
what is some evidence of the continental drift
- The coast lines matched up like a puzzle piece.
- Mountain ranges with the same rock types
- large land animals
What was the name of the super continent
Pangaea
who came up with the sea floor spreading hypothesis
Harry Hess
