Review Crossword Puzzle

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Across
  1. 2. Putting events in the order in which they happened (not the exact date)
  2. 3. Water changing from a gas back into a liquid
  3. 4. A biome that is cold 6 months out of the year, contains coniferous trees
  4. 6. Coldest land biome, there are no trees
  5. 8. Water changing from a liquid to a gas
  6. 9. A huge mass of ice that forms on land
  7. 10. Long term record of weather patterns in an area
  8. 12. A biome that receives very little rainfall year round
  9. 13. The layer of gasses that surround the planet
  10. 14. A law stating that the bottom layer of rocks is older than the top
  11. 15. Study of rocks and rock formations
  12. 16. A substance composed of only one type of atom
Down
  1. 1. Water falling from the sky, rain, snow sleet or hail
  2. 5. The exact age of something in years
  3. 7. Water found underground
  4. 9. A biome that has grass as the main vegetation
  5. 11. The layer of the atmosphere that weather occurs in