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What does Pangaea stand for?
Supercontinent / "Whole Earth"
What state of matter is the inner core?
Solid
As you go further into Earth what 2 things happen?
Pressure and heat increases
What is our core made out of?
Iron and Nickel
What state of matter is the mantle?
Semi-solid
Which layer is responsible for our magnetic field?
Outer core
Which is the densest layer of Earth?
Inner core
Which is the hottest layer of Earth?
Inner core
Which is the thickest layer of Earth?
Mantle
Which is the thinnest layer of earth?
Crust
What is density?
How tightly packed atoms are
What are convection currents?
Hot fluids rising (by becoming less dense) and cold fluids sinking (by becoming more dense)
Which layer contains convection currents?
Mantle
What are our 4 earth layers
crust, mantle, outer core, inner core
What idea/observation caused Wegener to come up with his theory?
He thought South America and Africa fit like puzzle pieces
Did scientists accept Wegener's Theory at first? Explain why.
No, they couldn't imagine HOW - and Wegner could not provide proof of this
How much do our tectonic plates move a year?
About an inch
When did Pangaea exist?
200-250 mya
The theory that there was once one giant landmass that came together as one, and eventually broke apart into our continents today
Continental Drift Theory
Who came up with the theory of continental drift?
Alfred Wegener
What year did Alfred Wegener propose his theory?
1912
What were the 3 pieces of evidence that support Alfred Wegener's Continental Drift?
-Fossils/rocks/tropical plants , -seafloor spreading, - plates are still moving today


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