Dig it up

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Across
  1. 4. Rock containing metal
  2. 6. The rigid outer part of the Earth consisting of the crust and upper mantle
  3. 8. Can't replenish itself
  4. 13. The remains of a living thing
  5. 14. Finding new things.
  6. 15. trying to use less of a certain type of things.
  7. 18. The things around us
  8. 20. The regions of the surface and atmosphere occupying life
  9. 21. relating to water
Down
  1. 1. A us navy Soilder
  2. 2. All the water on a planet
  3. 3. The science or practice of farming
  4. 5. Using old used metal to create new metal forms
  5. 7. Process of liquid to solid
  6. 9. Process of liquid to gas
  7. 10. A stock or supply of money,materials,staff and other assets.
  8. 11. Non-renewable energy sources the are old
  9. 12. the gases surronding the Earth or another planet.
  10. 16. Can replenish itself.
  11. 17. on or relating to the Earth
  12. 19. digging up resources