The Hydrosphere


Video Study Guide: Glaciers (Earth Revealed Series; 26 minutes)


What do glaciers leave behind when they retreat?


Describe how snow is converted to glacial ice.


What part of a glacier moves quickest? What part moves slowest?


What is basal slip?


Why do continental ice sheets flow away from their center?


What is the snowline?


What are striations?


What is till?


What are moraines?


Summarize the theories concerning the origin of ice ages.


Why do rivers often run faster during an ice age?


What causes kettles?


How do atmospheric CO2 levels relate to ice ages?


How long ago did the last ice age end?


Do ice ages occur at the same time in the Northern and Southern Hemispheres? Why?


How much have atmospheric CO2 levels increased since 1850? Why has this happened?


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