Dynamic Earth Vocab. Mamou

2. Formed when the is a divergent boundary of only oceanic crust.
5. The study of Earth's magnetic polarity.
6. This scientist discovered mid-ocean ridges (Specifically the Atlantic mid-ocean ridge)
8. This is the least dense layer of the Earth.
9. Lies at the bottom of Earth's ocean basins.
10. No one knows exactly how or why Earth's ________ periodically flips.
13. This is the hottest and most dense layer of the Earth.
14. The materials or elements of which each layer is composed.
16. This rock makes up part of the oceanic crust.
21. An arc-shaped chain of volcanoes.
22. An iron-rich mineral found in igneous rocks.
23. Forms Earth's land masses and is 25-70 km thick.
25. Contains convection currents.
26. In Greek it means, "all the Earth."
28. When plates move apart.
29. The tectonic plates move because they are part of these.
30. The sides of plates are ______ when in a transform boundary.

1. Formed when there is a convergent boundary of only oceanic crust.
3. This type of rock is mostly what continental plate are made of.
4. When Earth's magnetic fields flip.
7. This occurs when one denser plate slides under the other.
11. This theory states that Earth's lithosphere is broken up into distinct plates.
12. The way in which the layers behave due to pressure and heat.
15. This is the liquid layer of the Earth.
17. This scientist was buried in Greenland and is still there.
18. This theory was ridiculed at the time, but turned out to be true.
19. When plates slip past each other.
20. Plates come together at what kind of boundary.
22. The largest layer of the Earth.
24. These help us understand the composition of the Earth.
27. The shaking that results from the movement of rock beneath the Earth.