Briefly explain the sequence in which a soil develops. What will be an ideal response?
Soil formation begins at the surface and proceeds downward. The process begins with the weathering
of bedrock, a stage that resembles soil horizon "C", and proceeds from increased leaching, organic
activity, and organic material content to the formation of humus, or soil horizon "O".
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The planets and the asteroid belt orbit the Sun in ________.
A. orbits nearly identical to the Oort cloud of comets B. planes, whereas the Oort cloud of comets has a spherical distribution C. a spherical distribution similar to that of the Oort cloud of comets D. planes tilted at an angle to the plane of the Oort cloud of comets E. a spherical distribution, whereas the Oort cloud of comets orbits in a plane
A country with a large amount of arable land and a small number of farmers will have a
A) high physiological density. B) low physiological density. C) high agricultural density. D) low agricultural density. E) low arithmetic density.
If a back-arc basin is associated with a volcanic island arc, what tends to develop there?
A) Submarine trench B) Wide continental shelf C) Long, linear sea D) Rift valley
Which nation below has the greatest percentage of its population living below the UN defined global poverty line?
A) India
B) China
C) Nigeria
D) Mexico
E) Pakistan