Chapter 25 Flashcards
a system of mountain ranges on the seafloor separated by valleys
Mid- Ocean Ridge
forms in between peaks along the mid-ocean ridge
Rift Valley
where two plates collide
convergent plate boundary
a thick and buoyant continental plate meets a tin and dense oceanic plate, the denser plate dives beneath the continent in a process
subduction
boundary between two plates that are moving apart
divergent plate boundary
type of boundary where plates slide horizontally past each other in opposite directions
transform plate boundary
is the sudden movement or vibration of the ground occurs when rocks slip/slide along enormous cracks in Earths crust called faults
earthquake
is a crack in Earths crust along which rock has moved
fault
the sudden release of strain energy as rocks moves along a fault
elastic rebound
the point of origin for an earthquake
focus
the point on on Earths surface directly above the focus
epicenter
Who came up with the continental drift hypothesis?
Alfred Wegener
What where some of the evidence that backed up his hypothesis?
- large land animal fossils
- cost lines matched up like puzzle pieces
- mountain ranges matched up with the same rock type and ages
What was the name of the super continent?
Pangaea
Who came up with the seafloor spreading hypothesis?
Harry Hess
