Boundaries
What are the three types of boundaries?
Convergent, Divergent, Transform Boundaries
Where is new rock formed?
At a mid-ocean ridge/divergent boundary
What structure is formed at a divergent boundary?
Rift Valley or Mid Ocean Ridge
Which type of crust is more dense?
Oceanic crust
What scientist came up with the theory of Continental Drift?
Alfred Wegener
What type of boundary is it when two plate collide?
Convergent Boundary
Where is old rock recycled back into the mantle?
At the trenches/convergent boundaries/subduction zone
What is formed when two continental plates colliding?
Mountains
The continents were once joined together in a single large landmass called what?
Pangea
What is the theory that plates under the earth make up the earths surface and move because of intense heat?
What is the theory of plate tectonics
What type of boundary is it when two plates diverge or move apart?
Divergent Boundary
What fault line runs through California?
San Andreas Fault
What is created at a transform boundary?
Earthquake
What is the movement of heated materials upward and the movement of cooled materials downward called?
What is once piece of evidence Alfred Wegener used to support his theory?
the nineteenth century longitude determenations (longitude lines on a map), the shape of continents, fossil evidence, matching rock types and geological structures, and ancient climate patters
What type of boundary is it when two plates slide past each other?
Transform Boundary
What plate boundary creates trenches?
Convergent
What is formed when two ocean plates moves away from one another?
Mid-Ocean Ridge
Why was Alfred Wegener’s Continental Drift Theory not accepted at the time?
There was not enough evidence at the time.
What is another force besides convection currents that help move tectonic plates?
Gravity or density
What are the three types of convergent boundaries?
continental-continental, oceanic-oceanic, and oceanic-continental
What plate boundary creates volcanoes?
convergent boundary
What feature can be formed at a convergent boundary?
Trench, Mountains, Volcanoes or Islands
What happens at a subduction zone? which plate is subducted?
Two plates collide and the oceanic plate gets pushed under the continental plate
What layer of the Earth makes up the tectonic plates?
Lithosphere