Across
- 3. A puppy digging a hole in the backyard.
- 5. The wind blowing pieces of rock into another rock and creating unique rock formations.
- 7. Fungus that grows and releases an acid that breaks down rocks.
- 9. Weathering that changes size and shape only.
- 12. Little pieces of broken down rocks or minerals.
Down
- 1. Sediments piling up on the ocean floor.
- 2. Rocks in the desert getting really hot, expanding and then cracking.
- 4. A metal combines with oxygen, in the presence of water, to form an oxide.
- 6. Polluting gases mix with water in the atmosphere and can dissolve rock.
- 8. Waves carrying sand away.
- 10. Weathering that changes mineral composition.
- 11. Water gets into a crack, freezes, expands and makes the crack bigger.