Theories
Theory that the continents once fit together to make a super continent.
Continental Drift
Alfred Wegener
Plate boundaries that are moving together (colliding)
Name of the super continent that Wegener proposed.
Pangaea
The ______ of the continents led Wegener to believe that they once fit together.
Shape
Theory that the oceanic crust is moving apart due to new material pushing up between them.
Sea Floor Spreading
This scientist worked in the military and came up with the theory of sea Floor spreading.
Harry Hess
Plate boundary where the plates are moving away from each other.
Divergent boundary
The crust is made up of multiple free moving pieces called.
Tectonic Plates
The plates move at a rate of 3-5 ___ per year
cm
This theory was not accepted by other scientists.
Continental Drift
This scientist discovered the mid Atlantic ridge.
Marie Tharp
Boundary where the plates are moving past one another in opposite directions like cars on the road.
Transform Plate boundary
This type of heat transfer is the driving force for the plates movement.
convection
What country was Alfred Wegener from
Germany
1915
Harry Hess worked for this governmental agency towards the end of his life as a geologist on a mission that would be remembered throughout history.
NASA
Example of a mature divergent boundary.
Mid-Atlantic ridge
Name of the super ocean that went along with Pangaea.
Panthalasa
The area where an oceanic plate moves under a Continental plate is called a ___________ zone
Subduction
In the late 1960s this theory was the culmination of multiple scientists work as well as multiple theories. This is our modern theory explaining our dynamic crust and how it moves and changes.
Plate tectonics
This scientist worked with Fredrick Vine studying the ocean floor and the alternating magnetic bands that can be found in the Atlantic ocean floor.
Drummond Matthews
The Himalayan Mountains are formed from this specific plate boundary.
Continental/Continental Convergent Boundary
Flat topped features on the ocean floor that Harry Hess discovered.
Guyots
The rocks found on the ocean floor the farthest away from the mid Atlantic ridge are _________
Oldest