Which mineral reacts readily with cool, dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas?

A) quartz
B) plagioclase
C) calcite
D) gypsum


Ans: C) calcite

Environmental & Atmospheric Sciences

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Which one of the following is NOT a significant environmental cause of death worldwide?

A. genetically modified organisms B. traffic accidents C. air pollution D. water pollution

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Briefly explain how a stream might adjust toward an equilibrium state following a heavy rain. What will be an ideal response?

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If some current trends and energy strategies continue and succeed over the next few decades, in 50 years, you might be able to say that you witnessed the shift from

A) an energy-consuming economy to an energy-producing economy. B) a wind-driven economy to a solar economy. C) an unsustainable fossil-fuel-driven economy to a sustainable renewable energy economy. D) a renewable energy- driven economy to a clean-burning natural gas economy.

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Denver is now one of the world's most important centers of cable television in large part because

A) its location is ideal for satellite transmission around the world. B) it has a well-educated work force. C) the Federal Communications Commission is headquartered there. D) it offers tax incentives to cable television corporations.

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