Across
- 1. living thing chemically changing a rock
- 6. causing rocks to break apart when ice seeps into cracks and forces it apart
- 7. the process by which the outer layers of rock slowly peel away due to pressure changes
- 8. the breaking down and wearing away of rock by the mechanical action of other rock
- 10. rocks composition and appearance changing
- 11. types of physical weathering
- 12. often forces sidewalks apart
Down
- 2. chemicals combining with oxygen
- 3. rocks breaking into smaller sediments
- 4. the breakdown of rock material by physical and chemical processes
- 5. another name for causing rocks to break apart when ice seeps into cracks and forces them apart
- 9. forms holes in rocks