natural resources

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Across
  1. 3. a metamorphic rock: this can be split into layers and used as a roofing material
  2. 4. used to help dyes stick to fabric
  3. 6. a renewable source of fuel oil
  4. 7. the “building blocks” of rocks
  5. 8. a porous sedimentary rock used on SLATE
  6. 12. a sedimentary rock found around the lothians: that is easy to cut into blocks
  7. 13. used to extract some metals from their ores
  8. 14. technique used to extract essential oils
  9. 16. older dyes were extracted from these
  10. 18. the amount of this in soil decreases as it is warmed up
  11. 19. a rock with a lot of a metal in it
  12. 20. types of metals that can only be extracted using electricity
  13. 21. a fertile soil of clay and sand containing organic matter
  14. 22. an essential oil in citrus fruits
Down
  1. 1. a metal that can be extracted from its ore by heat alone
  2. 2. a purple flower which is commonly used for extracting essential oils
  3. 5. oils that give plants their fragrance
  4. 6. these are smaller in igneous rocks that cooled more quickly
  5. 8. used to extract some metals from their ores
  6. 9. is much better than water at dissolving oils
  7. 10. rocks formed from grains of other rocks
  8. 11. Rocks that have been changed from one type to another by heat
  9. 12. type of dyes that have brighter colours than natural ones
  10. 15. rocks formed from magma
  11. 17. a bit of this helps water drain from soil