The primary difference between the O and A horizons is that the O horizon usually has
A) more leaching than the A horizon.
B) less leaching than the A horizon.
C) more plant litter than the A horizon.
D) less plant litter than the A horizon.
C) more plant litter than the A horizon.
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The hotspots strategy is thought to be a very _____ way to protect much of the earth's remaining biodiversity
a. expensive b. cost effective c. questionable d. unscientific e. politically correct
What do most scholars agree is the most significant component of globalization?
A) economic reorganization of the world B) climate change C) political transition around the planet D) international terrorism E) cultural hybridization
According to the Milankovitch theory, the total heat received from the sun varies very little, but
the interaction of orbit and tilt changes is enough to cause climate changes. Indicate whether the statement is true or false.
Which of the following techniques would be most effective in separating the components of salt water?
A) pouring the liquid off the solid B) evaporation C) filtration D) none of these