Across
- 4. losing 2866 or more a year
- 9. the layer of gases that surrounds the earth
- 10. very dry, less dense layer
- 11. surface temperature that is so low that glaciers form at poles and in mountain areas
- 13. 950-1250 C.E.
- 14. absorbs and scatters ultraviolet radiation
- 15. expands in volume as it gets warmer
Down
- 1. glaciers retreat because of warmer weather
- 2. the tendency of water to expand in volume as it gets warmer
- 3. under water current fueled by the mixing of warm and cold saltwater
- 5. contains air we breathe and every aspect of what we call weather
- 6. decreased steadily, ice free arctic is expected by 2030-2040
- 7. 16th-19th centuries
- 8. glaciers that grow and advance
- 12. When the hemisphere is facing the sun about half of incoming solar radiation passes through the atmosphere and warms the sun.