Across
- 1. is very hot molten, found in a volcano
- 3. small particles of rock broken off by the weathering
- 4. are solid that have variety of special shape
- 6. particles often microscopic, very soft rock
- 7. the strongest one of the 3 rock tupes
- 8. is a model geologists use to explain the endless cycle of changes
- 11. temperature change,the action of water and ice,wind and more
- 12. granite is made from it
- 15. have very small crystal in them, part of the igneous group
- 17. erosion and deposition of sediment
- 18. is a dark igneous rock
Down
- 1. is used for building and sculpture
- 2. particles of sand, usually harder than mudstone
- 4. involes water and chemicals in the water and air reacting
- 5. the study of rocks
- 9. form when dead plant matter or animal debris
- 10. is a light coloured igneous rock
- 13. rocks that are made up of chemical substance
- 14. is used for stone tools
- 16. characteristics of sedimentary rocks