Plate Tectonics
What 3 major natural disasters are caused by plate tectonics?
Volcanic Eruptions, Earthquakes, Tsunamis
True or False: Plates slide past each other easily.
False
True or False, divergent boundaries only happen underwater.
False!
Ex. Iceland, African Rift Valley
True or False: All convergent boundaries have a subduction zone.
False! Don't forget about continental-continental convergent boundaries that made the Himalayas!
What did Alfred Wegener name the super-continent he believed to have existed millions of years ago?
Pangaea
What is the scientific name for the rigid layer of earth made up of the crust and upper mantle?
Lithosphere
At a transform boundary, which direction are the plates moving?
Sliding past one another in opposite directions.
Divergent boundaries create or destroy tectonic plates?
Create.
Are tectonic plates created or destroyed at a convergent boundary?
Destroyed.
This theory states that the plates that make up the earths surface move and shift because of intense heat.
The Theory of Plate Tectonics
What is the scientific term for the gooey, semi-liquid layer upon which the lithosphere moves?
Asthenosphere
Transform boundaries typically cause this type of disaster.
Earthquakes!
At a divergent boundary, what land features are usually present? Name one.
A ridge. A rift valley. Volcanoes.
Why does the oceanic crust sink in a subduction zone?
Because it is more dense.
Name two pieces of evidence Alfred Wegener used to try to prove his theory of continental drift?
the shape of continents loosely fit together, fossil evidence, matching rock types and geological structures, and ancient climate patterns
What causes plates to move?
Convection Currents
What famous fault in California is caused by a transform boundary?
What famous divergent boundary runs in-between the Americas and Europe/Africa?
Mid-Atlantic Ridge
In a subduction zone, the sinking oceanic plate creates this feature on the ocean floor.
A deep trench.
Who eventually proved Alfred Wegener correct?
Marie Tharp
Why is our earth's core still so hot?
Residual Heat and Radioactive Decay
What type of force is in a Transform Boundary?
Shearing
What famous scientist proposed the idea of sea floor spreading? (Hint: NOT Tharp)
Henry Hess
What famous trench is formed by oceanic-oceanic boundaries near Japan?
Marianas Trench
False.