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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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
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.
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
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