Why are rain and sea ice composed of freshwater?
a) Evaporating water does not carry salt ions, and freezing water expels salt ions.
b) Rain takes on the ions of the surrounding atmosphere, and ice takes on the ions of the surrounding water.
c) The statement is false because both rain water and sea ice have salt.
d) Chloride ion must ionic bond to sodium to form salt, and if sodium is available, salt will be in ice and in rain.
e) All of the above.
A
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Minimum insolation occurs in the middle latitude zone of the Southern Hemisphere on:
a. March 21. b. June 21. c. September 22. d. December 21.
Briefly explain how a UTM zone is defined in terms of its central meridian, standard meridian, and scale factor.
What will be an ideal response?
Where is the most mature soil found on a stream terrace formation?
A) on the highest-elevation terrace B) on the lowest-elevation terrace C) soil age is mixed throughout the terraces D) under the densest layer of vegetation
Natural levees are constructed of machine-compacted sand and mud; artificial levees are made of concrete.
a. true b. false