Across
- 3. a type of sedimentary rock
- 5. the hardest mineral
- 8. how shiny a rock is
- 9. the Islas Canarias is an example of this
- 10. the materials that settle when water or wind stops
- 14. an example of a mountain range
- 15. an open-pit mine
- 16. an external process that changes the earth's surface
Down
- 1. consists of crust, mantle and core
- 2. Earth's internal energy causes part of the crust to sink and form this
- 4. a mineral with irregular shape
- 6. measured in grams per cubic centimetre
- 7. when it cools quickly, it forms igneous rocks
- 11. formed from other rocks
- 12. two agents that remove material from rocks and soil
- 13. formed in the atmosphere, along with snow and wind
- 17. a mineral from which the metal is extracted