Earth's Structure and the Scientific Method

1. How was the Earth's Interior structure discovered?
2. What are the layers of the Earth?
3. How are the inner and outer cores different? The outer core is liquid and the inner core is solid. (Jennifer Martinez)
4. What is Earth's Electromagnetic Field and how is it formed?
5. What are geomagnetic reversals and how do we know they occur?
6. How does Oceanic crust and continental crust differ?
7. What is the Mohorovicic discontinuity and how was it discovered?
8. How deep have humans drilled into the Earth?
9. Who was Alfred Wegener? Alfred Wegener was a geophysicist and meteorologist that came up with the theory of Continental Drift. (Eryn Bollin, from livescience.com)
10. What was the theory of Continental Drift? Continental drift is a theory that explains how continents shift position on Earth's surface.Wegener thought all the continents were once joined together in an "Urkontinent" before breaking up and drifting to their current positions. (Eryn Bollin, from livescience.com)
11. What were the multiple lines of evidence that Wegener's used to support his theory?
12. Why was there Early Opposition to Wegener's idea?
13. What is the Ring of Fire, where is it, and who discovered it?
14. When was the Theory of Plate Tectonics proposed and how did it fundamentally change science?