Temi's puzzle

5. and Greenland.
7. the greenhouse effect due to
8. removal of carbon dioxide and oxidation of methane.
10. sheets- permanent layers of ice covering a tract of land,
11. hydrologic cycle, movement of water through evaporation, precipitation, runoff, and infiltration.
12. periods, glaciers growing and advancing.
14. and nitrogen.
15. a much thinner atmosphere, with no greenhouse
17. thin layer of gases that surrounds the air.
18. eruptions, release sulfur dioxide and
19. Earth’s atmosphere was mostly carbon
20. to glaciers to retreating.

1. darker areas on the sun’s surface.
2. is lowered.
3. air we breathe.
4. drilled into the glaciers in
6. bleaching, when coral polyps eject the symbiotic algae that live with them under stressful environmental conditions.
7. that scatter solar radiation.
9. dry and less dense layer.
13. periods, the overall climate is warmer,
16. of time where Earth’s overall surface