Across
- 2. another word for physical weathering
- 3. -rocks caused by friction
- 5. when carbon dioxide reacts to rocks
- 7. expand and contract rocks
- 9. fungus that grows on rocks
Down
- 1. Rust
- 4. oxygen reacts to minerals
- 6. erosion when soil is open to rain
- 8. wedging
- 10. Smaller fragments colliding with rock surfaces