david's best crossword

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Across
  1. 5. the preserved remains or traces of living things
  2. 7. earth material deposited by erosion
  3. 10. the force that opposes the motion of one surface as it moves across another surface
  4. 13. the mixture of gases that surrounds the earth
  5. 15. the process by which elements move weathered rock and soil
  6. 16. the solid layer of rock beneath the soil
  7. 17. a land form made of sediment
  8. 19. a larger stream
  9. 20. a tiny groove in soil made by flowing water
Down
  1. 1. a copy of an organism
  2. 2. the amount of sediment that a river or stream carries
  3. 3. a large mass of ice and snow on land
  4. 4. a sphere that represents earth's surface
  5. 6. a land form made up of flat or gently rolling land with low relief
  6. 8. a stream that flows into a larger stream
  7. 9. wave-washed sediment along a coast
  8. 11. an animal with a backbone
  9. 12. mixture of humus,clay,and other minerals
  10. 14. the ability to work or cause change
  11. 18. the sediments deposited directly by a glacier