CH25 Flashcards
Hess discovered a system of mountain ranges on the seafloor separate by valleys
mid-ocean ridge
A long,narrow depression
rift valley
The boundary where two plates collide
convergent plate boundary
when a thick and buoyanty continental plate meets a thin and dense oceanic plate, the denser plate dices beneath the continent in a progress
subduction
the boundary between two plates that are moving apart
divergent plate boundary
This type of boundary where plates slide horizontally past each other in opposite direction
transform plate boundary
id the sudden movement or vibration of the ground tat occurs when rocks slip and slide along enormous cracks in Earth’s crust called faults
earthquake
is a crack in earth’s crust along which rock has moved
fault
this sudden release of strain energy as rock moves along a fault
elastic rebound
the point of origin for an earthquake
focus
the point on earth’s surface directly above the focus
epicenter
Who came up with the Continental Drift hypothesis
Alfred Wegener
What were evidence of this theory?
large land fossals,mountain ranges, rock type
What was the name of the super content
Pangaea
Who came up with the Seafloor spreading Hypothesis
Harry Hess
How did he discover sea floor spreading
sonar
What is the Mid-ocean ridge
A continuous mountain range
What are the types of plate boundary’s
Divergent boundary, convergent boundary, transform boundary
How do convergent boundaries move
They collide
Sub-diction zones occur with witch type of plate boundary
convergent
what are 2 types crust that are used for plate boundary’s
Oceanic crust and continental
what types land forms can be created when two oceanic
Deep sea trench,hot spots
what happens when two oceanic amearge
mountains
How do divergent plates move
They move away from each other
