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
How do Plate Tectonics effect us?
They effect us by causing different natural disasters (i.e. volcanoes, earthquakes, tsunamis)
What evidence did Harry Hess find in the ocean to validate Wegener's theory?
He found that the seafloor was getting wider at the mid-ocean ridge.
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 volcanic arc or volcanic 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 boundary is located at the San Andreas Fault line?
What is Transform Boundary?
Alfred Wegner was said that continents did what?
slowly moved
What causes Plate Tectonics to move?
Convection Currents
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
What type of plate boundary results in the creation of Mountains?
What are convergent boundaries?
Why didn't geologists and other scientists believe his theory of Continental Drift?
Because he could not explain HOW continents moved
Where do Hot Spots occur?
At subduction zones
Deep
What evidence is proof of Continental Drift
A. Magnetic Reversal B. Fossil Evidence C. Mountain Ranges identical across different countries.