A snowline refers to
A) the latitude demarcating the extent of glacial ice during the last glacial maximum.
B) the elevation at which snow accumulation ceases, marking the uppermost point of a glacier.
C) an isoline demarcating the extent of snow or ice on a weather map.
D) the lowest elevation where winter snow accumulation persists throughout the summer.
E) the latitude or elevation at which winter snow accumulates each year.
D
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The actual cost of gasoline that U.S. consumers purchase for their cars is
a. about $1 per gallon which makes it even more unfair that we are currently paying around $4 per gallon. b. about $4 per gallon, so the current prices at the pump are right on target. c. about $6 per gallon which is more in line with fair prices paid in European countries d. about $14 per gallon when one considers estimated harmful environmental and health costs. e. it was $2 per gallon until Hurricane Katrina and Deep Horizon oil spill caused increases in production costs and decreases in availability.
Which of the following are common tectonic settings associated with volcanic activity? CHOOSE ALL THAT APPLY.
a) continental rifts b) mantle plumes c) continental arcs d) transform plumes e) island arcs
The best approach to sustaining freshwater biodiversity is the "species approach."
Answer the following statement true (T) or false (F)
Although most of the world's forest are shrinking, biologist are especially concerned about tropical forest loss because?