Inner Structure of the Earth and Magnetism

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Across
  1. 2. common metal in Solar System
  2. 3. moving silicates under the crust
  3. 7. south african city famous for its gold and diamond mines
  4. 11. magnetic and geographic poles are not the same
  5. 12. the longest latitude
  6. 14. heavy and black volcanic rock used for roadworks
  7. 15. source of the internal heat of Earth
Down
  1. 1. renewable energy resource
  2. 4. radioactive material
  3. 5. compass was known there during the 3rd century
  4. 6. the Earth revolves on it
  5. 8. real shape of the Earth
  6. 9. plain lies below sea level
  7. 10. land of fire and ice
  8. 13. the innermost part of Earth