What function does the upper atmosphere ozone layer serve?
a) It protects against the sun’s harmful ultraviolet radiation.
b) Its gases trap heat in the earth’s atmosphere leading to the greenhouse effect.
c) This atmospheric layer provides a rich source of CFC used as a refrigerant to fuel
air conditioning units.
d) The ozone layer is the source of oxygen needed to breathe.
a) It protects against the sun’s harmful ultraviolet radiation.
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Fossil evidence linking the Gondwana continents includes the:a
lake-dwelling Mesosaurus and large land-dwelling reptile Lystrosaurus and Cynognathus. b. freshwater Mesosaurus and dinosaurs Brontosaurus and Tyrannosaurus. c. freshwater crocodiles and the large amphibian Eryops. d. reptile Dimetrodon and the first bird Archaeopteryx. e. lake-dwelling Mesosaurus and the large land-dwelling reptiles Dimetrodon and Edaphosaurus
What is not an effective means of saving energy in transportation?
A. taxing gasoline B. switching from electrified rail systems to diesel-powered systems C. giving tax breaks on fuel efficient automobiles D. encouraging bicycle use by building bike lanes along highways and city streets E. building accessible mass transit systems
Of the biogeochemical cycles, which have been interfered with by the actions of humans, which is thought to be likely to have the most far-reaching effects on the biosphere?
A) Oxygen B) Nitrogen C) Carbon D) Water E) Copper
Four out of five cities in the United States that lost population between 2000 and 2010 were located in ________
Fill in the blank(s) with correct word