Across
- 3. (two words) plants send out root systems, fine roots find their way into cracks.
- 5. process that presses sediment together
- 15. a rock that explodes out of underwater volcanos
- 16. cools above the earths surface
- 17. (two words) made up of dead plant matter or animal debris
- 18. when particals are broken down and carried away
- 19. (two words) liquid layer made up of iron
- 22. blanket of gas surrounding a planet
- 25. mineral grains aranged in randomly
- 26. as underlying rock layers are exposed, there is less pressure on them and the expand.
- 27. (two words) it is caused by gases or acids
- 28. thinnest layer of the Earth
- 29. (two words) the hottest part of the earth
- 30. volcanic glass thats cools too fast for crystals to form
Down
- 1. glues particals of sediments together
- 2. the softer part of the mantle that the tectonic plates float on
- 4. process of breaking down rocks
- 6. (two words) pollutionns reaches the clouds causing it
- 7. (two words) cracking of rock by the expandsion of water as it freezes
- 8. thickest part of the Earths layers
- 9. a rock that has small visable crystals
- 10. the process of scraping or wearing away fine particals of rock.
- 11. cools beneath the Earths surface
- 12. (two words) proccess that breaks down a rock or mineral into smaller pieces
- 13. formed when magma or lava cools and chrystallized.
- 14. forms when an existing rock is changed by heat, pressure or chemical reactions
- 20. rocks made out of material that comes from rocks or remains of living things
- 21. explodes out of volcanos
- 23. grains aranged in parallel layers of bands
- 24. a person who looks at mineral composition, colour and texture of a rock