Most alternative energy sources can be said to be derived either directly or indirectly from the sun. The exception to this is
A. geothermal
B. photovoltaic
C. biomass
D. corn based fuels
E. wind
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What percentage of carbon is available for use in the world at the moment?
A. 5%
B. 25%
C. 50%
D. 90%
E. 100%
What is the largest source of stored carbon?
A. atmosphere
B. continental lithosphere
C. oceanic lithosphere
D. groundwater
E. trophosphere
Which of the following shows a change in the carbon cycle due to based on human impacts?
A. decrease in carbon dioxide in the atmosphere
B. increase in carbon dioxide in the oceanic lithosphere
C. increase in carbon dioxide in the continental lithosphere
D. increase in carbon dioxide in the atmosphere
E. decrease in carbon dioxide in the oceanic lithosphere
A wind turbine converts wind energy into electrical energy. If the turbine reads 1000 J of wind energy in a single day, the amount of electricity produced in the same time period would be
A. greater than 1000 J because electrical energy is higher quality than wind energy
B. less than 1000 J because some energy will be lost to the environment at the conversion point
C. greater when energy demands are high and less when energy demands are low
D. greater than 1000 J because the efficiency is 120%
E. equal to 1000 J because energy cannot be created or destroyed
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