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2. Is entirely made of liquid material
3. Is as hot as the surface of the sun
6. Is believed to be rotating backwards, or in reverse
7. Contains a sublayer called the Asthenosphere
8. Generates earth's magnetic field
10. Is roughly the same size as Mars
11. Is the deepest layer that humans have drilled into
12. Is primarily made of granite and basalt
13. "Flows" due to convection currents
14. Is slowly increasing in size (about 1 mm per year)
15. Mainly consists of Magnesium rich substances