Topsoil plays an important role in the ecosystem service of ____.
A. biodiversity
B. ecosystems
C. natural resources
D. win-win solutions
E. nutrient cycling
Answer: E
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A weather system is moving from west to east. You look at a weather map and see that you are in an area of closely spaced isobars with the center just to your east, but the spacing of the isobars increases away from you
What would you forecast for wind conditions? A) Winds will increase. B) Winds will stay the same. C) Winds will increase then decrease. D) Winds will decrease.
Between 1600 and 1870, it is estimated that more than ________ million slaves were shipped to the Americans from Africa
A) 9 million B) 19 million C) 2 million D) 100 million E) 20 million
This art work shows life on the sea bottom, at a time when fishes and creatures with shells appeared on Earth. What time period is represented?
A. Mesozoic B. Paleozoic C. Cenozoic D. Precambrian
Geothermal energy is produced by ____
A)hydraulic fracturing B)recent or current volcanic activity C)heat from Earth's interior D)hot springs E)states in the southern U.S.