ICE AGE

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Across
  1. 2. certain fossils known to exist in a particular place and time
  2. 3. the breakdown of rock into smaller peices from exposure to wind, water, gravity, etc
  3. 7. a flowing mass of ice and snow
  4. 11. when a species no longer has living members in existence.
  5. 14. a glacier that forms on land
Down
  1. 1. a glacier that forms on mountains
  2. 4. record all of the fossils that have ever been found
  3. 5. the comparison of fossils in different rock layers to determine how old a rock or fossil is
  4. 6. the circulation of water through the hydrosphere from earths surface to the atmosphere and back
  5. 7. the eroded sediment that is depositied as glaciers retreat and expand
  6. 8. a global climate marked by long periods of cold temperatures that cause glacial formation and expansion
  7. 9. the remains of ancient animals and plants, the traces or impressions of living things from past geologic ages, or the traces of their activities
  8. 10. the conditions of the atmosphere
  9. 12. the average weather in a location for over 30 years or more
  10. 13. the transport of sediment by wind, water, and gravity
  11. 15. cylinders of ice drilled out of glaciers that contain layers of snow, dust, volcanic ash, etc