Across
- 3. _______ and mosses produce weak acids that can weather the rock’s surface.
- 5. the breaking down and wearing away of rock material by the mechanical action of other rock.
- 6. the process by which the outer layers of rock slowly peel away due to pressure changes.
- 8. weathering, the breakdown of rocks by chemical reactions
- 9. animals dig ________ into the ground causing more rock to be exposed.
- 10. Stalactites and ___________ are common features in cave systems as dissolved chemicals are deposited by dripping rain water underground.
Down
- 1. breakdown of material by physical and chemical processes.
- 2. weathering, the process by which rock is broken down into smaller pieces by physical changes
- 4. wedging, cracks in the rocks allow water to seep in and freeze causing expansion.
- 5. precipitation, rain sleet or snow that contains a high concentration of acid
- 7. the process by which other chemicals combine with oxygen