What soil order is associated with low moisture areas and is one of the most globally extensive?
A. Histosols
B. Mollisols
C. Aridisols
D. Entisols
E. Aflisols
C
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What caused the dramatic decline in Guam's native bird species?
A) the thinning of their eggshells and the subsequent death of their young as a result of heavy DDT use on the island in the 1970s B) radiation poisoning caused by nuclear tests of the United States and France C) climatic change in the region D) the elimination by humans of its food supply E) the accidental introduction of the non-native brown tree snake
1992 and 1993 were cooler than average years primarily because
A) solar output dipped slightly. B) El Niño occurred. C) La Niña occurred. D) Mount Pinatubo erupted. E) ocean currents shifted significantly.
In North America and Eurasia, a great band of conifers (taiga) is found in Köppen's region of ____________________ climate
Fill in the blank(s) with correct word
Is it likely that the surface stream water in Sample Site 1 will be contaminated by groundwater from either the waste pit or the pasture? Why or why not?
The question is based on Figure 25-3, a map of a hypothetical landscape with an effluent stream flowing from northeast to southwest. Water table contours are drawn at 2-foot intervals and flow lines show the direction of groundwater movement at the top of the zone of saturation. The waste pit in the north was dug down to a depth just slightly above the water table in that location. A fenced pasture for grazing livestock is in the east. Two wells are shown, and the locations of three water quality sampling sites along the stream are indicated. What will be an ideal response?