Science Crossword Puzzle

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Across
  1. 1. The freezing and thawing of ice
  2. 4. A hollow at the head of a valley
  3. 7. A cavity in the Earth
  4. 12. Able to Seep through
  5. 13. oxygen and iron combine togther
  6. 14. A large mass of ice that moves down a slope
  7. 16. A mass of rock and setiment that are deposited
Down
  1. 2. When setiment is carried away by wind water or ice
  2. 3. When setiment is deposited somewhere
  3. 5. Small particles of rock,soil,and animal remains
  4. 6. Sand hills formed by wind and sand
  5. 8. Weathering rock is chemically broken down
  6. 9. A process that breaks down other substances
  7. 10. The wearing away of rock
  8. 11. A passageway that connects a smaller river to a larger one
  9. 15. The shape of a coast