Layers of the Earth and Wegener Flashcards
(8 cards)
1
Q
Crust
A
Temp= 200-400 degrees Celsius
Made of rocks and contains living things
Least dense layer
2
Q
Mantle
A
Temp= 1000-3000 degrees Celsius
Made of Iron, Calcium and Magnesium in liquid form
Density= 4.5 grams per cubic cm
3
Q
Outer Core
A
Temp=4000-5000 degrees Celsius
Made of liquid Iron and Nickel
Density= 9.9 grams per cubic cm
4
Q
Inner Core
A
Temp=6,000 degrees Celsius
Made of solid iron
Most dense layer
5
Q
Convection Currents
A
Happen in the Mantle and Outer Core
6
Q
Wegener’s Proof
A
He found proof in fossils, land features and climate
7
Q
Wegener’s Limitations
A
He couldn’t explain why or how the continents drifted. Didn’t know what forces caused it.
8
Q
Wegener’s Theory
A
The Continental Drift Theory. Stated that the continents had all once been joined together and had drifted apart.
