Peyton

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Across
  1. 4. wedging wedges of ice in rocks widen and deepen cracks
  2. 5. iron combined with oxygen in the presence of
  3. 6. weathering this type of weathering is rock being physically broken down into smaller pieces
  4. 10. it removes rock particles by wind,gravity and ice.
  5. 11. this process breaks down rock and other substances
  6. 12. growth as roots grow from the plants they force the cracks further apart
Down
  1. 1. dioxide dissolves in rain water
  2. 2. refers to the grinding away of rock by rock particles carried by ice wind or gravity
  3. 3. means that a material is full of tiny connected spaces that water passes through
  4. 7. weathering breaks down rock through chemical changes
  5. 8. the average condition in an area
  6. 9. is a chemical compound composed of hydrogen atoms