The energy source with the highest net energy ratio for transportation is
a. gasoline
b. coal liquefaction
c. natural gas
d. oil shale
e. ethanol from sugar cane residue
C
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What two processes cause the diversity of life on Earth to change through time?
What will be an ideal response?
La Niña typically leads to ____.
A. an increase in the earth's average temperature for 1 or 2 years B. severe storms and flooding C. temperature extremes D. tornadoes E. wetter winters in the Pacific Northwest
Representative animals in this biome include red fox, white-tailed deer, southern flying squirrel, opossum, bear, and a great variety of birds
A) tropical savanna B) desert C) midlatitude broadleaf and mixed forest D) arctic and alpine tundra
Sodium sulfite, Na2SO3(aq), is added to wine as an antioxidant since it reacts with the oxygen of the air to form sodium sulfate, Na2SO4(aq). Which of the following is the balanced equation for this reaction?
A) Na2SO3(aq) + O(g) ? Na2SO4(aq) B) Na2SO3(aq) + 2 O(g) ? Na2SO4(aq) C) 2 Na2SO3(aq) + O2(g) ? 2 Na2SO4(aq) D) Na2SO3(aq) + O2(g) ? Na2SO4(aq)