What method is specifically designed to reduce soil erosion caused by runoff of rain water?
A. contour planting
B. alley cropping
C. windbreaks
D. shelterbelts
Answer: A
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Look at the upper portions and margins of the alluvial fans shown on the map and in the stereogram (especially the alluvial fan at the mouth of “Grotto Canyon”). In recent years does it appear that erosion or deposition has been more prominent at the tops of these fans?
The questions on the following page are based on Figure 45-4, a stereogram of the Stovepipe Wells region of Death Valley, California, Figure 45-5, a portion of the “Stovepipe Wells, California” quadrangle (scale 1:62,500; contour interval 80 feet; north is to the left side of the stereogram and topographic map), and Map T-27a, color aerial imagery of this same region of Death Valley. Several large alluvial fans that come out of the Tucki Mountains are coalescing to form a bajada 136°35'17"N, 117°06'35"W).
Figure 45-5: USGS “Stovepipe Wells, California” quadrangle. North is to the left side of the page (scale 1:62,500; contour interval 80 feet, dotted lines represent half-interval contours<--N).
Which of the following personal actions could have the greatest impact in reducing greenhouse gas emissions?
A) driving a hybrid car using ethanol B) recycling aluminum to the nearest industry C) eating organically D) switching to all compact fluorescent bulbs for lighting E) increasing home insulation
In an essay, discuss the important legacies of the Soviet economy for the economic and social infrastructure of the Russian Domain.
What will be an ideal response?
The major difference between richness and equitability is that
A) richness is a measure of biodiversity and equitability is a measure of competition. B) richness expresses how complicated the organisms that make up an ecosystem are, while equitability only considers the number of organisms. C) richness is a count of the number of species present in an ecosystem and equitability describes how evenly distributed the populations of each species are. D) richness describes the number of r-selected species in an ecosystem and equitability expresses the number of K-selected species in an ecosystem.