Fossil fuels are best described as a(n) ________ energy source
A) environmentally friendly
B) efficient
C) nonrenewable
D) renewable
E) clean
Answer: C
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Which has more atoms: a 1-gram sample of carbon-12 or a 1-gram sample of carbon-13?
A. a 1-gram sample of carbon-13 B. a 1-gram sample of carbon-12 C. They have the same number of atoms. D. More information is needed.
A biodegradable material is one that is consumed and destroyed by organisms that live in the soil or water
Indicate whether the statement is true or false
Updrafts dominate the cumulonimbus cloud during the ________ in the life cycle of an air mass thunderstorm
A) mature stage B) cumulus stage C) dissipating stage
Together, ________, ________, and ________ provide more than 81 percent of the energy consumed in the United States
A) uranium; hydroelectricity; coal B) coal; nuclear power; wind energy C) natural gas; wind power; biofuel D) oil; coal; natural gas