Across
- 3. is formed when an existing rock is changed by heat, pressure, or chemical reactions
- 4. how a mineral looks when it breaks apart
- 5. formed when magma hardened beneath Earth's surface
- 6. ring shaped coral island found far from land, on top of a volcanic island that has sunk
- 8. is igneous rock formed from lave that erupted onto Earth's surface
- 10. the color of a minerals powder
- 11. naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition
- 12. term used to describe how a mineral reflects light from its surface
- 14. is a sedimentary rock that forms when rock fragments are squeezed together
- 17. is the process in which dissolved minerals crystallize and glue particles of sediment together
- 18. driven by plate tectonics, creates new rocks and recycles old rocks
Down
- 1. ranks ten minerals from softest to hardest
- 2. a rock that has large and small crystals showing the different ways it cooled (fast above Earth's surface and slow below Earth's surface)
- 7. how a mineral splits along flat surfaces
- 9. forms from the cooling of molten rock
- 13. process that presses sediments together
- 15. a narrow channel or slab of a mineral that is much different from the surrounding rock
- 16. forms when particles of other rocks or the remains of plants and animals are pressed and cemented together