Across
- 4. repeating pattern of a mineral having flat sides
- 6. elements that are shinny, conduct heat and electricity
- 10. igneous rocks formed from lava on the outside of the earth
- 12. igneous rocks formed from magma within the earth
- 14. hard substance composed of two or more minerals
- 15. the ability of a mineral to resist being scratched
- 17. rocks formed when chemical changes, heat or pressure
- 18. rock containing rounded pebbles that is held together by clay or mud
- 19. when a mineral breaks along a rough or jagged surfaces
- 20. naturally occurring,inorganic solid
Down
- 1. minerals or combinations of minerals from which metals and nonmetals are extracted
- 2. when a mineral splits into a smooth, define surfaces
- 3. rock formed from hot, fluid magma or lava
- 5. the way a mineral reflects light
- 7. minerals that are rare,hard,beautiful and durable that often cut for jewely
- 8. the color of the powder scraped off of a mineral
- 9. the amount of matter in a given volume
- 11. rocks formed from sediments and erosion
- 13. elements with dull surfaces, are poor conductors of electricity
- 16. the process of changing a rock into another as a result of heat, pressure or chemical reactions