300 million years ago Ancestral North America was
A) in its present day location.
B) part of Pangea.
C) at 60 degrees north latitude.
D) at the south pole.
Answer: B
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A. offshore oil well B. livestock feedlot C. urban land D. cropland E. logged forest
Which of the following sewage purification systems uses solar greenhouses and artificial marshes?
A. living machines B. compost toilets C. primary sewage treatment D. secondary sewage treatment E. septic tanks
Which of the following is a clear advantage in the use of nuclear power instead of fossil fuels?
A) Nuclear plants are cheaper to build than power plants that burn fossil fuels. B) Nuclear power can be used today to power most forms of public transportation. C) Nuclear power contributes less to global climate change. D) Nuclear power generates fewer wastes with lower health risks.
Energy can be formally defined as
A. the random motion of molecules.. B. the capacity to do work or to transfer heat. C. a force that is exerted over some distance. D. the movement of molecules. E. the loss of matter.