Name ___________________________
Date ________________ Period ______
1. The cryosphere is the ________________ _____________________ of the Earth.
2. For over__________________ the world’s glaciers and ice sheets have been relatively quiet.
3. What important scientific question does Balog work help to answer: ___________________
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Changes in ice are nothing new...
4. Waxing and waning of ice sheets have been the driving force that has guided
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5. In the past, the cycle of ice ages and periods of warming were caused by__________________
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6. Now, the burning of ______________________________________ has increased
___________________________, which trap heat in the ____________________________________
7. What’s been happening over the last 40 years in Alaska?________________________________
8. How are scientists using wave technology to measure ice movement of the Columbia
glacier? ____________________________________________________________________________
9. From May 2007 – June 2008 __________________ ice has been lost from the Columbia glacier.
10. The Columbia glacier is moving __________________________. This is ________ times faster
than __________________ years ago.
It is not just the Columbia Glacier that is at risk…
11. How long until we lose all glaciers on Earth? ________________________________________
12. How much is sea level expected to rise from melting mountain glaciers? ________________
13. How many people get their drinking water from Himalayan glaciers? ___________________
14. How much is sea level expected to rise if Greenland and Antarctica polar ice sheets melt
completely? __________________________.
Wake up call…
15. What happened in the summer of 2002? ____________________________________________.
16. In the last decade how have temperatures risen in Greenland? ________________________.
17. How much did sea level rise when the temperature in Greenland rose 7°F? ______________
18. What is essential to understanding the melting of the ice sheets in Greenland? ___________
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Ice Cores…
19. Ice cores are like _________________________________that allow us to peer deep into the
history of the ice.
20. What can we learn from the bubbles of air in the ice? _________________________________
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21. What do the thickness of layers represent?___________________________________________
22. What is the direct historic link that scientists have found by studying ice cores? __________
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23. What happened in Greenland 125,000 years ago? ____________________________________
24. What is the explanation for the rising temperatures? ______________________of fossil fuels.
25. How fast is the Jakobshavn glacier moving toward the ocean? _________________________
26. How much more ice is Greenland losing than it’s gaining each year? ____________________
Disappearing lake…
27. What is the significance of the disappearing lake and movement of Jakobshavan glacier?
____________________________________________________________________________________
28. What does the latest ocean research reveal about the speed of glacier movement? _________
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29. In the next century, the oceans will warm and expand accounting for a__________________
rise in sea level.
30. The combined melt of mountain glaciers, ice sheets and ocean rise due to warming will
raise the ocean a total of __________________________ by the year 2100.
31. _______________________of the world’s population live within that distance from sea level.
Beyond the next 100 years…
What do you think the next steps should be? How should the current and future governments
of the world move forward in planning? _______________________________________________
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