Show:
Theories
Plate boundaries
Action
The Geosphere
Miscellaneous
100
Developed the Theory of Plate Tectonics
What was Alfred Wegener
100
Boundary where the plates move apart
What is a divergent boundary?
100
The entire cycle of heating occurring in the mantle
What is convection currents?
100
Made up of the crust and upper mantle
What is the lithosphere?
100
The mid-ocean ridge is an example of this type of boundary
What is divergent?
200
The name Wegener named the one large continent
What is Pangaea?
200
The plate boundary where plates slide past each other
What is a transform boundary?
200
When two oceanic plates collide a(n) _____________ is formed.
What is an island arc?
200
Continental crust is less dense or more dense than oceanic crust
What is less dense?
200
The boundary that seafloor spreading is applied to
What is divergent?
300
These similar structures were found on different continents that were used to support the theory of continental drift.
What are rocks?
300
This type of boundary created the Himalayas
What is a convergent boundary?
300
__________________ can form above subduction zones
What are volcanoes?
300
The layer of the Earth that tectonic plates occupy
What is the lithosphere?
300
Fossils of warm weather plants found in the Antarctic would be related to this
What is climate?
400
The hypothesis that continents have slowly moved to their current location
What is continental drift?
400
The type of boundary that causes a rift valley to form
What is a divergent boundary?
400
The length of time it took the continents to make it to their current positions
What is 200 million years?
400
The zone where one plate slides under another
What is the subduction zone?
400
Came up with the idea of seafloor spreading
Who is Harry Hess?
500
The animal fossil that helped support the theory of continental drift
What is the Mesosauraus
500
The number of MAJOR plates that have been discovered
What is 15?
500
The most geographically active region on the surface of the Earth
What are the boundaries between tectonic plates?
500
The solid part of the Earth consisting of all rock, soils, and sediments on the Earth's surface
What is the geosphere?
500
Volcanoes are closely associated with these two types of boundaries (where there are subduction zones and oceanic ridges)
What are divergent and convergent boundaries?