CH 25 Flashcards
Hess discovered system of moution ranges
mid-ocean Ridge
The boundary where two plates collide
Convergent plate boundary
Subduction
When a thick and buoyant continental plate meets a thin and dense oceanic plate, the denser plate dives beneath the continent in a process
Subduction
Transform plate boundary
The type of 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 and slide along enormous cracks in the earth called faults
Earthquake
the crack in Earth’s crust along which rock has moved
Fault
a sudden release of strain energy as a 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
A long narrow depression that forms in between peaks along the mid ocean ridge
Rift valley
The boundary between two plates that are moving apart
Divergent plate boundary
Who came up with the Continental drift hypothesis?
Alfred Wegener
What is some evidence for Wagner’s’ hypothesis?
- Coast lines match up like puzzle pieces
2.They found fossils
3.
What was the name of the super content?
Pangaea
Who came with the sea floor spreading hypothesis?
Harry Hess
How did Harry Hess map the bottom of the sea floor?
sonar
Who discovered the mid ocean floor?
Harry Hess
where at the bottom of the is the youngest going to be found?
closer to the mid-ocean ridge (MOR)
What are the types of plate boundaries?
Divergent
Convergent
Transform
How do convergent plate boundaries move
they collide
Subduction zones only occur with which of plate boundary?
convergent plate boundaries
What two types of crust are found in plate movement?
Oceanic crust and continental crust
what are the types of land forms that can be created when oceanic and continental crust converge?
Volcano’s and deep-sea trenches
What land forms are created when two oceanic crust converge?
deep-sea trench, hot spots (creates islands)
