The first stage in generating power from a hydrogen fuel cell is to ________
A) split hydrogen atoms into hydrogen ions (H+) and electrons
B) convert water into a hydrocarbon
C) react water with CO2
D) split methane (CH4 ) into hydrogen atoms and carbon
E) reduce water to hydrogen and oxygen gases
A
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The river depicted in this drawing shows prominent ________
A) base levels B) potholes C) flooding D) meandering
What is thought to be the cause of drought conditions over the past decade in the Southwestern United
States? a. Warmer sea-surface temperatures in the Pacific Ocean b. Increased rain shadow effect due to uplift of the Sierra Nevada c. A decrease in the thickness of the ozone layer d. Deforestation in the Pacific Northwest from logging e. Dust storms in China causing global dimming
The bacteria that cause Lyme disease are transmitted to humans directly by ____.
A. foxes B. deer C. white mice D. field mice E. ticks
During winter, ________ air masses are associated with poor air quality in urban areas because cold conditions lead to increased consumption of heating fuel
A) cP B) cT C) mP D) mT