Lecture 12.5 Overview of Earth -Dense rocky composition -Evolving surface <600 million years old -Atmosphere of nitrogen and oxygen -Oceans of water -Magnetic field Interior -Very dense 5500kg/m3 -The earth?s interior is differentiated -Interior structure is probed by studying how waves travel through it Differentiation- this is the separating of elements while the earth was still liquid, the denser ones sank o the core and the lighter ones floated to the top. -If the earth was a geologically? dead? Planet with no plate tectonics or atmosphere what would its surface look like today? Rocky barren, somewhat like the moon -since the industrial revolution people have been burning more trees and fossil fuel . this has caused the amount of CO2 to increase in the atmoshperer . what effect would you expect this ot hae on the temperature on earth? It would increase .
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