Where are most of the volcanoes on Earth located?
A. in the Ring of Fire
B. along the midocean ridge
C. in Sumatra
D. around the equator
Answer: A
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The color of a soil reflects
A. type of vegetation growing on the soil. B. development of peds. C. degree of soil horizon maturity. D. organic matter content (brown or black) and iron content (red).
For the year 2008, the FAO estimated that every person on the planet consumed at least ________ percent of their animal protein intake as fish.
A. 17 B. 42 C. 10 D. 5
By promoting mass transit, biking, and walking, the city of Portland, Oregon has saved its residents how much in transportation costs?
A. about $1 million B. more than $10 million C. about $100 million D. more than $1 billion E. about $10 billion
________ occurs when soil soaks water into the subsurface
A) Throughfall B) Overland flow C) Infiltration D) Stem flow