Across
- 2. a length of time in the Earth's history
- 3. the outer layer of Earth
- 5. wear caused by one rock rubbing against another
- 6. molten rock below the Earth's crust
- 9. small fragments of rock
- 11. when lava cools down on the earths surface
- 12. the inner part of the Earth
- 17. substance that makeup rock
- 20. a molten rock
- 21. the modern horse
- 23. when grains of sand were pressed together (sedimentary rock)
- 25. when eroded rock fragments settle
- 26. a liquid state
- 27. a division of time within an era
Down
- 1. wear on rocks caused by rains, wind, frost and temperature changes
- 3. squeezed into smaller space
- 4. the features of material, how it behaves
- 7. the layer of molten rock below the earth's surface
- 8. underground cooling
- 10. the remains of plants and animal from millions years
- 13. type of igneous rock
- 14. fragments of rock that fall on the Earth from space
- 15. a type of large particle found in soil
- 16. a type of small particle found in soil
- 18. allows water pass through
- 19. the remains and products of living thongs found in soil
- 22. carrying away fragments of rock
- 24. fragments of rock