Alfred Wegner
What was the super continent called that Alfred Wegner proposed existed 335mya?
The super continent that he proposed was called Pangea.
Plate Tectonics move each year. But how much do they move each year?
About the rate of the growth of a fingernail
Transform plate boundaries move _____________
past each other
When did he come up with the Continental Drift?
He came up with the Continental drift in 1912 (or early 1900s)
Plate Tectonics Theory came about in what decade?
The 60's
The further away from the mid-ocean ridge, the _____ the rocks.
Older
What happens at the boundary where continental/oceanic plates converge?
The Oceanic plate subducts under the Continental plate or a mountain range such as the Andes in S. America
What are Plate Tectonics made of?
They are made of continental and oceanic crust.
What theory did Alfred Wegner come up with?
He came up with the theory of Continental Drift.
Which layer of Earth do the Plate Tectonics glide on?
aesthenosphere
Sea Floor Spreading is...
Sea Floor Spreading is when the sea floor spreads away so magma rises to the surface to take its place.
These type of boundaries have no volcanoes
Transform
What are the three types of volcanoes?
Cinder, shield, and composite
Alfred Wegner said that continents did what?
floated on top of water
What causes Plate Tectonics to move?
Mantle Convection
What is found at divergent boundaries on land?
Rift Valleys
What could happen if the Mid-Atlantic ridge continues as it is now for the next 100 million years?
There could be a new supercontinent
Why didn't geologists and other scientists believe his theory of Continental Drift?
Because he had no evidence to back up his ideas
Where do Hot Spots occur?
in the middle of a lithospheric plate
Deep
What evidence is proof of Continental Drift? A. Magnetic Reversal B. Fossil Evidence C. Fossil Fuels
B. Fossil Evidence