Across
- 4. can be mixed with cement to make concrete
- 8. rock formed from just one mineral
- 10. slate is formed in....
- 11. the rock that santa will give you if you misbehave
- 14. one or more of these make rocks
- 16. a completely black volcanic rock with a glossy shine
- 17. decompose or breakdown because of bacteria/fungi
- 18. these can be found in rocks and may tell us about an animals history
- 19. these burn easily, generate heat which can be used to power generators for electricity
Down
- 1. a place where rocks are extracted from the earths surface
- 2. rock made of feldspar, quartz, mica and others
- 3. rocks formed from fragments of other rocks
- 5. the name of the small holes found in some rocks
- 6. a sedimentary rock that reacts with HCl to form CO2
- 7. these are formed when magma under the earths surface cools and solidifies
- 9. a layered form found in many metamorphic rocks
- 12. a species of living thing that no longer exists
- 13. sedimentary rock grains
- 15. rocks formed from lava or magma