Alfred
Name Wegener's theory.
Continental Drift Theory
Harry Hess used this new technology to map the ocean floor.
sonar
This boundary occurs when two of the Earth's Plates separate from each other.
Divergent Boundary
What is the name of the super continent?
Pangea
T or F The Mid-Ocean Ridge is the tallest mountain range in the world.
F longest
Describe Wegener's Continental Drift Theory.
The idea that the continents were connected or joined millions of years ago and have since separated.
Harry Hess discovered that sea floor spreading happens because the molten material does these 3 things.
Cools, hardens and forms new land.
This is type of boundary happens when two of the Earth's Plates come together.
Convergent Boundary
Mesosaurus was a fresh water fossil found on both the coast of Africa and S. America. How could this be evidence for Continental Drift?
The reptile could not have traveled that far in salt water. This means the two continents must have once been connected.
T or F Most of the Mid-Ocean Ridge is under water.
True
How did Alfred Wegener die?
He froze to death looking for food in Antarctica while trying to find more evidence.
The land nearest the Mid Ocean Ridge is ______________ than the other land.
younger
Mountains are formed at this type of boundary.
Convergent.
What are Glacial Striations?
Scratches from Glaciers that were once on land that moved and made marks (scratches) called Striations.
The Mid Ocean Ridge happens at this type of boundary?
Divergent
What was Wegener's first clue or piece of evidence for Continental Drift?
The shape of Africa and South America appears as if they could connect perfectly.
Old land subducts back into the mantle through _____________________.
Trenches
Rift Valleys and trenches form at this type of valley.
Divergent
How are mountain ranges evidence for Continental Drift?
The mountain ranges of N. America and N. Europe are made of the same type of rock which means they used to be connected.
Which type of heat transfer is the cause of Sea Floor Spreading?
Convection
Why was Alfred Wegener's theory rejected?
He could not explain how the continents moved.
Iron that has lined up on the ocean floor in a pattern is known as __________________.
Magnetic stripes
Earthquakes happen at this type of boundary.
Strike slip or transform
Describe the importance of Glossopteris Fossil.
The Glossopteris fossil is a tropical plant whose fossil was found in Antarctica. This could only have happened f Antarctica was actually warm once which would man that it used to be closer to the equator and has moved.
What does Convection cause to happen in the mantle that causes the plates to move.
The heat causes waves called convection currents in the mantle that cause the plates to move.