Weathering crossword

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Across
  1. 2. when rocks breaks down through chemical changes
  2. 5. secretes weak acid that dissolves rock
  3. 7. CO2 dissolved with water creates carbonic acid
  4. 9. when rocks physically break into pieces
  5. 12. Caused by pollution
  6. 13. oxygen combines with iron bearings material to rust
  7. 14. wearing down of material
Down
  1. 1. a material full of tiny connected air ways that all water to seep through
  2. 3. pressure released causing the rock to break and peel
  3. 4. transporting the weather material
  4. 6. animals dig holes splitting the rock apart
  5. 7. the weather in a certain region
  6. 8. wearing away of rock particles
  7. 10. chemical reaction of water and other substances
  8. 11. water seeps through cracks of rock,freezes,expands, and splits rock