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Across 1. The process by which rocks are formed, altered, destroyed, and reformed by geological processes and which is recurrent, returning to a starting point. 3. The molten rock material under the earth's crust, from which igneous rock is formed by cooling. 5. The process of compacting or the state of being compacted. 7. Molten rock that reaches the earth's surface through a volcano or fissure. 9. To cause to form crystals or assume a crystalline structure. 11. Solid fragments of inorganic or organic material that come from the weathering of rock and are carried and deposited by wind, water, or ice. 14. To raise; elevate. 18. Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice (glaciers), and wind. Sedimentary rocks are often deposited in layers, and frequently contain fossils. 19. The group of natural processes, including weathering, dissolution, abrasion, corrosion, and transportation, by which material is worn away from the earth's surface. 20. The transfer of energy from one body to another as a result of a difference in temperature or a change in phase.

Down 2. The act, process, or result of cementing. 4. Rock that was once one form of rock but has changed to another under the influence of heat, pressure, or some other agent without passing through a liquid phase. 6. To make less warm. 8. The act or an instance of transporting. 10. To be changed from a solid to a liquid state especially by the application of heat. 12. Rocks formed by the cooling and solidifying of molten materials. Igneous rocks can form beneath the Earth's surface, or at its surface, as lava. 13. The act of depositing, especially the laying down of matter by a natural process. 15. Any of the chemical or mechanical processes by which rocks exposed to the weather undergo changes in character and break down. 16. The application of continuous force by one body on another that it is touching; compression. 17. A naturally occurring, homogeneous inorganic solid substance having a definite chemical composition and characteristic crystalline structure, color, and hardness.