Mining

12345678910111213141516171819202122
Across
  1. 2. I had great fun, I had a ______
  2. 4. Object hurled toward Earth from space
  3. 9. A heart of ____
  4. 11. A girl's best friend
  5. 14. Implement for making holes
  6. 15. The study of rocks and minerals
  7. 16. Personal Protective Equipment
  8. 17. Sedimentary, metamorphic and igneous
  9. 18. Mining town
  10. 22. Second place medal
Down
  1. 1. Pennies used to be made with this material
  2. 3. Elevator _____
  3. 5. Uncovered
  4. 6. A type of rock that contains sufficient minerals with important elements, including metals
  5. 7. Barium, feldspar, gypsum, zinc
  6. 8. Bin for washing
  7. 10. Opposites attract
  8. 11. Detonated from afar
  9. 12. Left after an impact from a large object
  10. 13. Material left over after smelting process
  11. 19. To remove impurities or unwanted elements
  12. 20. A quarter takes five of these
  13. 21. A type of large, long-necked bird