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