The fertile soils of the Rift Valley are explained by
A) extensive glaciation during the last ice age.
B) volcanic activity associated with the area.
C) large-scale agricultural projects.
D) voluminous river systems in the area.
E) voluminous river systems and extensive glaciation.
B) volcanic activity associated with the area.
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Measure from the 500? contour line on the west side of the feature, across the summit at 667?, to the 500? contour line on the east side of the feature. How wide is the feature?
Use the profile constructed in Figure 23.5 to answer the question and completion items.
What will be an ideal response?
To be useful as a source of water, a rock must be
A. both porous and permeable. B. porous but not too permeable. C. permeable but not too porous. D. low in both porosity and permeability.
By definition, parasites ________ their host
A) kill B) never kill C) are much smaller than D) get nourishment from and harm E) live on the external surface of
Which of the following most likely indicates that sea level has fallen relative to the land?
A. wave-cut notches and platforms that are above sea level B. offshore sandbars that have become coastal dunes C. marine terraces D. the presence of coral reefs on land E. All of these choices are correct.