Erosion and agents of erosion

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Across
  1. 2. The slow movement of sand and rocks by the(4 letters)
  2. 4. This force pulls materials downhill (6 letters)
  3. 5. moved by erosion and deposited elsewhere (7 letters)
  4. 7. Tiny particles carried by wind or water (5 letters)
  5. 8. The removal of surface materials by natural forces (7 letters)
  6. 9. The breakdown of rocks into smaller pieces (9 letters)
Down
  1. 1. Agent of erosion that carves valleys and moves sediments (5 letters)
  2. 3. Ocean waves that shape coastlines (5 letters)
  3. 4. Agent of erosion caused by ice (7 letters)
  4. 6. The natural process that moves weathered materials (8 letters)