earth and space

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