Most of Earth's seismic activity, volcanism, and mountain formation occur along
A) convergent boundaries.
B) divergent boundaries.
C) plate boundaries.
D) transform fault boundaries.
C
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In 1970, the U.S. passed the Clean Air Act which limited emissions from stationary (industrial) sources, including coal-burning power plants. Why has this law not been as successful as hoped in reducing air pollution?
A. The older coal-burning and industrial plants were not required to comply with the law. B. Coal-burning plants built after 1970 were not required to comply with the law. C. The U.S. started importing coal from China which produces more emissions. D. Emissions from coal-burning plants in Iceland have offset our reductions.
The ________ era is known as the "age of flowering plants."
A) Precambrian B) Paleozoic C) Cenozoic D) Devonian E) Silurian
Permeability is a function of how interconnected open spaces are within a rock mass. Indicate whether the statement is true or false
Which portion of proton-translocating ATPase is embedded in the membrane?
A) a B) b C) F0 D) F1