The production of hydrogen to power cars in the United States requires
A) nearly a million gallons of freshwater each day.
B) a net input of energy.
C) fusion reactions typical of nuclear power plants.
D) fermentation using water and sugars.
B
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If a mineral lacks planes along which it may cleave, what will occur?
A. The mineral will fracture in an irregular pattern. B. The mineral will fracture evenly along predictable planes. C. The mineral will still cleave, but it will only occur along one plane. D. The mineral will not break.
Changes in Earth's orbital configuration may lead to warming temperatures. These warming temperatures, in turn, may lead to the release of both CO2 and CH4. Increases in these gases may further warm the planet. This is an example of a
A) positive feedback loop. B) negative feedback loop. C) neither a positive or negative feedback loop.
In the movie The Poseidon Adventure, a cruise ship is overturned by a tsunami while at sea. This plot is not valid because
A) tsunamis do not have the energy to overturn a ship of that size. B) tsunamis do not occur in the open ocean. C) tsunamis do not form high waves while in the open ocean. D) the tsunami in the movie didn't occur in a tectonically active area.
During which of the following times does Buenos Aires, Argentina receive the same number of hours of sunlight as New York City, USA? Choose all that may apply
A) Summer solstice B) Spring equinox C) Winter solstice D) Fall equinox