Across
- 2. rock formed from the cooling of molten rock on Earth’s surface; because they cool slowly, intrusive igneous rocks have a coarse texture and large, clearly visible crystals
- 4. a naturally formed, inorganic solid with a crystal structure and a definite chemical composition
- 6. an air pocket that forms as an extrusive igneous rock rapidly cools and hardens
- 8. the remains or traces of a once-living organism that is preserved in rock
- 9. rock formed from sediments, organic remains, or chemical precipitates
- 11. rock formed from the cooling of molten rock below Earth’s surface; most extrusive igneous rocks originate in volcanic eruptions; because they cool slowly, extrusive igneous rocks have small crystals or no crystals at all
- 13. sedimentary rocks composed of the remains of living organisms
Down
- 1. the sizes, shapes, and positions of the grains in a rock
- 3. sedimentary rocks composed of rock fragments cemented together
- 5. rock that has been changed by heat and pressure; often formed at plate boundaries and in mountain ranges
- 7. sedimentary rocks formed from chemicals dissolved in water
- 8. the texture of a metamorphic rock in which mineral grains are aligned like the pages of a book
- 10. to organize objects or events into groups based on common characteristics
- 12. layers of sedimentary rocks formed that form from the deposition of sediments; “stratum” is the singular form of “strata”