The Great Lakes were formed by which of the following physical processes?
A. The gouging and eroding action of continental glaciers.
B. fault-block dropping like Lake Baikal in Siberia.
C. the erosion of the ancient St. Lawrence River by wind.
D. chemical dissolution of the limestone bedrock.
A. The gouging and eroding action of continental glaciers.
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The _______________ includes the crust and portions of the upper mantle.?
Fill in the blank with correct word.
The UNHCR (United Nations High Commission for Refugees) identified 3 groups forced to migrate for political reasons. Who are they?
A) refugees, IDPs, asylum seekers B) refugees, political prisoners, those displaced by earthquakes and tsunamis C) asylum seekers, guest workers, IDPs D) IDPs, refugees, indigenous persons E) refugees, political exiles, indigenous persons
In the best-case scenario (strict mitigation), temperatures in the U.S. desert southwest are predicted to rise 5 degrees Celsius by late century
a. True b. False
The reason scientists believe the reflective bright nebulae contain more heavy materials than the emission bright nebulae is that ________
A) they are dimmer than a low density source could produce B) they are blue, and that color is associated with carbon C) they reflect more colors than the emission nebulae D) they glow brighter than an energy emission source could produce E) they are brighter than a low density source could produce