Which of the following is a documented negative impact of hydroelectric dams?
A) alteration of river salinity
B) increased atmospheric CFCs
C) decreased rainfall
D) alteration of river sediment deposition
E) acid deposition
Answer: D
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The classic scientific method includes
A. predicting the results of experiments. B. performing experiments. C. formulating general rules that organize findings. D. all of the above
If the Earth were significantly smaller, oxygen, water vapor, and other volatiles would escape to space and Earth would lack an appreciable atmosphere.
Indicate whether the statement is true or false.
There were multiple sources of water that contributed to the ocean. How was the majority of the ocean's water formed?
A) The condensation of a cloud composed of dust and gas from exploded stars B) The condensation and cooling of water vapor C) The infiltration of comets D) None of these choices
What often produces colorful precipitated minerals because of improved solution properties and large mineral content?
A. saltwater bodies B. hot springs C. dolomite formations D. volcanoes E. artesian cold springs