The average salinity of sea water is approximately ________ percent of total mass
A) 3.5
B) 5
C) 7.5
D) 10
E) 20
Answer: A
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A group of organisms and the nonliving physical and chemical environment in which they interact is
A) a biosphere. B) an ecosystem. C) a closed system. D) a vernacular region.
The increase in atmospheric oxygen during the Proterozoic was caused by ____
a. a decrease in worldwide volcanism. b. a decrease in the size of oceans.
c. photosynthesis by cyanobacteria. d. the appearance of land plants. e. formation of banded iron formations
The recent increase in forest fires in the United States is most related to
A) increases in logging in the region. B) a decade of drought. C) government policies that have dramatically increased the size of forests in the west. D) new management policies that no longer try to stop or control wildfires.
Some argue that globalization will have a negative impact because ________
A) it entails weakened central power as a result of homogenization B) it allows multinational corporations to attain greater power over global trade C) it will decentralize control of power to many stakeholders D) citizens will gain more economic power E) governments will gain more power in regulating trade