Deforestation of rain forests exposes tropical soils that are famous for their low fertility, despite the fact that they had previously hosted a lush tropical forest. Which soil type would describe these soils?
A) Andisols—young soils formed on volcanic ash and volcanogenic sediment
B) Histosols—Organic soils with little or no climatic implications. Can be found in any climate where organic debris can accumulate to form a bog soil. Dark, partially decomposed organic material commonly referred to as peat
C) Vertisols—Soils containing large amounts of clay, which shrink upon drying and swell with the addition of water. Found in subhumid to arid climates
D) Oxisols—Soils that occur on old land surfaces unless parent materials were strongly weathered before they were deposited. Rich in iron and aluminum oxides, Oxisols are heavily leached, hence are poor soils for agricultural activity
D
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The colors dispersed by a prism are due to different light
A. energies inside the prism. B. directions inside the prism. C. speeds inside the prism. D. none of the above
In regions of moderate to high rainfall, the top of a stream is the same as the:a
top of the zone of aeration. b. top of the zone of saturation. c. bottom of the aquifer. d. bottom of the zone of aeration. e. top of the water table
Surface winds blow across isobars at an angle and the pressure gradient force is balanced by the ____ force and the Coriolis force.?
a. ?surface b. ?pressure gradient c. ?frictional d. ?centripetal e. ?gravitational
Which of the following is the basis of one Earth year?
a. One complete revolution of Earth around the Sun b. One complete rotation of Earth on its axis c. One complete rotation of the Moon on its axis d. One complete cycle of the phases of the Moon