The loss of permafrost secondary to global warming in parts of Canada, Russia, China, Mongolia, and Alaska is causing
a. the release of CO2 from the soil into the atmosphere
b. the release of CH4 from the soil into the atmosphere
c. the release of hydrogen gas from the soil into the atmosphere
d. the release of nitrogen gas from the soil into the atmosphere
e. the release of CO2 and CH4 from the soil into the atmosphere
E
You might also like to view...
Advection
A) does not involve the movement of air. B) is more similar to convection than to conduction. C) requires the radiative release of heat energy. D) occurs primarily when wind "flagpoles" are parallel to isotherms. E) none of the above
Why is the eye region of a hurricane largely free of precipitation and heavy clouds?
A) cooler temperatures B) pressure gradient is weaker C) rising air motion D) sinking air motion
The process whereby streams lengthen their channels upstream is called
A) headwater erosion. B) channel incision. C) stream piracy. D) saltation.
The puzzle-like fit of the continents, similarity of rock types across continents, and glacial evidence all were pieces of evidence supporting Wegener's hypothesis of continental drift. What was another piece of supporting evidence?
A. land bridges were discovered connecting Africa and South America B. continents were found to have plowed through ocean basins to move into current positions C. distribution of similar fossils across multiple continents D. gravitational pull of the Moon was found to be responsible for connecting Pangaea