Elizabeth's Spheres Crossword Puzzle

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Across
  1. 1. Living creature not a plant
  2. 4. Essential gas for breathing
  3. 6. where birds fly
  4. 7. Thin-layer of ice
  5. 9. All water on Earth's surface
  6. 10. flowing freshwater stream
  7. 12. organisms that photosynthesizes
  8. 13. Community of living organisms
  9. 14. Turn into ice
  10. 16. Fluffy white formations in the sky
  11. 18. Floating mass of ice
  12. 19. Dense area of trees
  13. 20. moving ridge on water's surface
Down
  1. 1. Layer of gases surrounding Earth
  2. 2. Glaciers, ice caps, and sea ice
  3. 3. Air in motion
  4. 5. Water animal with gills
  5. 8. All living organisms on Earth
  6. 11. small creatures with six legs
  7. 15. small narrow river
  8. 17. vast body of saltwater