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Across 2. layer of molten iron and nickel that surrounds the inner core of Earth. 6. transfer Of thermal energy by movement of a fluid 7. dividing line due to different densities between the mantle and the outer. 8. dividing line due to different densities between the mantle and the crust 11. evidence that scientist can physically see or touch to help understand what is being observed 12. direct transfer of heat energy through space by electromagnetic waves 15. dense sphere of solid iron and nickel at the center of Earth 16. evidence that scientist can gather to help make inferences about what is being observed 17. the layer of hot, solid material between Earth's crust and core 18. dark, dense, igneous rock with a fine texture, found in oceanic crust 19. light colored, igneous rock that is found in continental crust

Down 1. Soft layer of the mantle on which the lithosphere floats 3. ovement of a fluid caused by differences in temperature, that transfers heat from one part of a fluid to another 4. the layer of rock that forms Earth's outer surface 5. direct transfer of thermal energy from one substance to another substance 9. rigid layer made up of the uppermost part of the mantle and the crust. 10. the force exerted on a surface divided by the total area over which the force 13. that travel through earth carrying the energy released during an earthquake 14. the amount of mass of a substance in a given volume