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Who came up with the theory of continental drift?
Alfred Wegener
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
How much do our tectonic plates move a year?
About an inch
Did scientists accept Wegener's Theory at first? Explain why.
No, they couldn't imagine HOW - and Wegner could not provide proof of this
What idea/observation caused Wegener to come up with his theory?
He thought South America and Africa fit like puzzle pieces
What are our 4 earth layers
crust, mantle, outer core, inner core
Which layer contains convection currents?
Mantle
What are convection currents?
Hot fluids rising (by becoming less dense) and cold fluids sinking (by becoming more dense)
What is density?
How tightly packed atoms are
Which is the thinnest layer of earth?
Crust
Which is the thickest layer of Earth?
Mantle
Which is the hottest layer of Earth?
Inner core
Which is the densest layer of Earth?
Inner core
Which layer is responsible for our magnetic field?
Outer core
What state of matter is the mantle?
Semi-solid
What is Earth's core made out of?
Iron and Nickel
