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Across 2. Rock made of layers 5. Molten rock that hardens 6. Hot and cold currents in the mantle 12. Hot liquid layer that surrounds inner core (2 words) 13. Sticking together of rock 16. Molten rock inside the Earth 17. Crust and upper mantle make this layer 18. Souce of sediment (2 words) 19. Ancient animals petrified in rock 20. Pieces of the Earth's crust 21. Bits of rock broken away from parent rock

Down 1. Boundary that seperates the crust fromt the mantle 3. Rock that cools oustide the Earth's crust 4. Rock that has changed due to heat and pressure 5. Hot solid center of the Earth (2 words) 7. Metamorphic rock with no layers (2 words) 8. Metamorphic rock with layers 9. Squeezing of rock 10. Semi-molten zone just below the lithosphere 11. Hard thin surface of the Earth 14. Molten rock that escapes to the surface 15. Rock that cools inside the Earth's crust 16. Largest layer of the Earth, mostly solid