What is the difference between ice sheet, sea ice, and ice shelf?
What will be an ideal response?
Ice sheets are large continental glacial masses, flowing outward in all directions from accumulation centers. Sea ice is free-floating ice fed by glaciers calving and forming icebergs. Ice shelves are large, relatively flat ice masses that float seaward from the coast but remain attached to the land along at least one side.
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Shale oil and tar sands ____ than conventional oil deposits.
A. are easier to extract B. have a lower net energy yield C. have less environmental impact D. are in shorter supply E. are less expensive to produce
The informal sector in the periphery subsidizes products for consumers in the core
Indicate whether this statement is true or false.
Reconstruction of Paleozoic paleogeography is well documented by magnetic stripe data from rocks 600 to 250
million years old on the ocean floor. a. True b. False
What are the four basic units that make up the geologic time scale? List the specific ones that apply to the present day
What will be an ideal response?