Continental Drift
Who first proposed the idea of continental drift?
Alfred Wegener
Which layer of Earth's interior is slowly drifting over time?
Lithosphere ( Crust )
This type of plate boundary creates mountain ranges.
Convergent: Continental/Continental
Earthquakes and tsunamis
What type of plate boundary runs along the West coast of South America?
Convergent
What was the first and weakest piece of evidence used to support the theory of continental drift?
The continents appear to be able to fit together like puzzle pieces.
Which process drives plate tectonic motion?
Convection
Which type of plate boundary is responsible for Earthquakes?
Transform
The process of one plate sinking below another at a convergent boundary.
Subduction
What is the density of Oceanic Crust?
3.0 g/cm3
This later theory from the 1960s finally provided the mechanism Wegener lacked.
Theory of Plate Tectonics
The layer in which convection occurs is know as what?
Asthenosphere
The Mid Atlantic Ridge spans the entire length of the Atlantic Ocean and is an example of this type of boundary
Divergent
The Hawaiian Islands are the result of a stationary magma plume known as a ________ ________.
Hot Spot
The side of a convergent plate boundary that the arrows are pointing TOWARDS is the
Overriding Plate
What is the name of the Supercontinent that existed before they drifted apart?
Pangea
Describe why convection can happen in the Asthenosphere
Because this layer is partially melted and behaves like plastic.
This term describes one plate overriding another that sinks back into the mantle.
Subduction
Non volcanic mountain ranges form at these boundaries (crust specific).
continental-continental convergent
Name the boundary that is responsible for Earthquakes on the West Coast of the US
San Andreas Fault
Alternating reversals of __________________ on either side of a mid ocean ridge is one strong piece of evidence supporting the theory that was discovered AFTER Wegener's death.
Magnetic Polarity
At roughly what rate do tectonic plates move?
2 to 10 cm per year
Which factor will cause one plate to sink back into the mantle in a convergent boundary?
That plate has a high density
Name the two main surface features found at divergent boundaries.
Mid Ocean Ridges (ocean-ocean divergent) and Rift Valleys (continent-continent divergent)
Which plate is the Hawaiian hot spot found ?
The Pacific Plate