By the nature of its deposition, which of the following has the largest spatial extent (covers the most area)?
A) Glacial erratics
B) Terminal moraines
C) Till
D) Drumlins
E) Recessional moraines
Answer: C
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Low clouds retard surface cooling at night better than clear skies because:a
the clouds absorb and radiate infrared energy back to earth. b. the water droplets in the clouds reflect infrared energy back to earth. c. the clouds start convection currents between them. d. the clouds are better conductors of heat than is the clear night air. e. the formation of the clouds releases latent heat energy
What type of transition state is involved during the decarboxylation of b-ketoacids?
A) a 5-membered cyclic system B) a 6-membered cyclic system C) an enol D) none of these
The main difference between firn and glacial ice is:
a. firn has a bluer color. b. firn has a lower density. c. firn flows plastically. d. firn is older. e. firn is the German word for glacial ice.
Which of the following does not belong with the others?
A) Pedestal B) Butte C) Pillar D) Mesa E) Alluvial fan