Across
- 2. The wearing away of a solid object due to the impact of particles carried by the wind.
- 4. Animals dig into ground and loosen soil.
- 7. Cycles of freezing and thawing of water in surface.
- 11. Rocks breaking apart without changing their chemical composition.
- 12. The loss of electrons during a reaction by a molecule, atom or ion.
- 13. A simple slow-growing plant that typically forms a low crusty, leaf like, or branching growth on rocks, walls, and trees.
Down
- 1. Acidic components, such as sulfuric or nitric acid that fall to the ground from the atmosphere in wet or dry forms.
- 3. Streaming water weathering down rocks.
- 5. Elongated forms of various minerals deposited from solution by slowly dripping water.
- 6. Tiny root hairs seeking out small cracks and pits in rock to grow and expand.
- 8. Disintegration of rocks caused by chemical reactions.
- 9. Pits in the ground that form in areas where water gathers without external drainage.
- 10. The peeling away of sheets of rock millimeters to meters in thickness from a rock's surface.