Glacier flow

3. the circulation of water through the hydrosphere
4. a global climate marked by long periods of cold temperatures that cause glacial formation and expansion
6. the breakdown of rock into smaller pieces from exposure to wind, water, gravity,changes in temp, and/ or biological forces
8. masses of ice and snow perminately covering an area
10. the average weather in a location over 30 years or more
12. glaciers that form on mts and flow down hill
16. all of the fossils that have ever been found, which scientists use to understand Earth's history

1. the eroded sediment that is deposited as glaciers retreat and expand
2. conditions of atmosphere
5. the transport of sediment by wind, water, or gravity
7. when a species no longer has living members in existence
9. the comparision of fossils in different rock layers
11. cylinders of ice drilled out of glaciers that contain layers of snow, dust, volcanic ash, atmosphere gases and microbes from the past
13. certain fossils known to exist in a certain time or place
14. a flowing mass of ice and snow
15. the remains of ancient animals or plants