Across
- 5. type of igneous rock with large crystals
- 6. studies rocks
- 9. used for industrial extraction of metals
- 11. outermost layer of the earth
- 13. hot molten rock inside the Earth
- 14. made of LIQUID iron and nickel
- 15. Mohs scale is a measure of this property of rocks
- 16. a basalt with holes
Down
- 1. small pieces that reflect light in rocks
- 2. colour of the powdered or crushed mineral
- 3. contains metals
- 4. made of SOLID iron and nickel
- 7. glass like rock, used to make surgical blades
- 8. magma on the surface of the Earth
- 10. made from cooling of lava
- 12. used for removing dead skin
- 13. earth's solid layer which FLOWS