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Across 4. Rock that has been changed by heat and pressure. 6. Igneous rock formed from the cooling of molten rock on Earth's surface. 8. Most important sedimentary biologic rock made from the remains of organic matter. 9. Metamorphic rock in which the minerals line up in layers. 11. Most common sedimentary chemical rock made from calcite. 13. Metamorphic rock with no visible layering. 14. Sedimentary rock composed or rock fragments that are cemented together. 15. Sedimentary rock formed when water evaporates leaving solids behind. 18. The natural process of adding transported sediments to a landform. 20. Rock that forms when magma or lava cools and solidifies. 22. Igneous rock formed from the cooling of molten rock below Earth's surface. 23. Determines the color of rocks. High content of this substance results in light colored rocks. 24. Igneous rock that contains air bubbles causing it to have very low density. 25. These rock or mineral particles are classified by their size, shape, and pattern.

Down 1. The compaction and cementing of sediments into rocks. 2. Process by which rocks are transformed from one type to another. 3. The transport of fragments of rock by wind, water, ice, or gravity. 5. Most common metamorphic nonfoliated rock. 7. Rock fragments that have been transported to a different location. 10. Rock formed from sediments, organic remains, or chemical precipitates. 12. Most common intrusive rock. 16. Sedimentary rock composed of the remains of living organisms. 17. Most common extrusive rock found on the ocean floor. 19. Most common metamorphic foliated rock. 21. Mixture of minerals, sediments, and sometimes insect fragments.