physical and chemical weathering

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Across
  1. 1. when 'exfoliation' takes place and peels away the outer layer of a rock
  2. 3. breaking down of the rock by the mechanical action of another rock
  3. 7. is when acid rain dissolve the minerals in the rock and create holes
  4. 8. a process that breaks down rocks due to the shape and size of the rocks without changing its physical makeup
  5. 9. when an animal breaks through ground and exposes it to the surface
  6. 10. when a rock goes through repeated cycles of freezing and thawing in cracks and the cracks expand
  7. 12. when something like moss that is slightly acidic dissolves the rock slowly
Down
  1. 2. makes caves with carbonic acid
  2. 4. a chemical change in which chemicals combine with oxygen to form rust
  3. 5. a process that breaks down rocks through chemical changes
  4. 6. when large roots add pressure to a rock into breaking
  5. 11. a type of physical weathering that makes glaciers, mud slides,land slides, waterfalls and river