Name______Date______Period______
NOVA/NATIONAL GEOGRAPHIC SPECIAL https://www.youtube.com/watch?v=6scs-Q-Ut_E
EXTREME ICE
Before watching the video, answer the following questions:
a. What is a glacier?
b. Why are glaciers important to humans or are they?
c. Do you think global warming is happening? Why or Why not?
d. What is the evidence for global warming?
During the video, answer the following questions: What year was this video made?
1. What is the cryosphere?
2. Why are the ice sheets important?
3. What do the time lapse photos reveal about the ice sheets?
4. What landforms have the ice sheets created in the past?
5. What caused ice ages and periods of warming?
6. How have humans affected the natural cycles?
7. What moves glaciers?
8. What is calving and what does it create?
9. Why did the Columbia Glacier begin flowing faster?
10. What sediments does the Columbia Glacier carry with it?
11. How far has the Columbia Glacier retreated up the fjord?
12. Why do they use seismic equipment on a glacier?
13. Why does water affect the demise of the glacier?
14. What is basal ice?
15. What makes the glacier white? Blue?
16. What is a trim line?
17. What is black ice? What happens to this ice?
18. What is the timeframe for the mountain glaciers to disappear?
19. How much will sea level rise? What will be the consequence of this?
20. What place will be the hardest hit? Why?
21. How much would the oceans rise if all the ice in Antarctica and Greenland melt?
24. What happened to cause people to pay attention to what was happening in Antarctica?
22. What is happening to Greenland’s ice sheet?
23. What are mulons?
24. What clues are stored in the layers of the Greenland ice sheet?
25. What has happened to the CO2 levels throughout the past history?
26. What is the cause of the CO2 levels to change?
27. Why are ice blocks dangerous?
28. What is a crevasse?
29. What created the ice canyon in Greenland?
30. What do scientists think happened to the missing water in the ice lakes?
31. What are wave cups?
32. How does the ocean increase the rate of flow of the glaciers in Greenland?
36. Over the next 100 years:
How much will the warm water of the oceans cause sea level to rise?
How much will the mountain glaciers melting cause sea level to rise?
How much will the combined melting of the ice sheets cause sea levels to rise?
37. What will happen to Florida, Vietnam, Bangladesh, and Island countries?
38. Why did early people give Iceland its name? Is that still the case today?
39. Why does the photographer see extinction in the battle between ice and surf?
After viewing the video, answer the following questions:
40. Write a paragraph explaining what the scientist meant when he said that “this is one of those pivotal moments in human history, ice is too important for us to continue to ignore it”.
41. How will humans have to adapt in order to survive sea level rise?
42. Why is it scientifically incorrect to ask “Do you believe in Global Warming?”