Most thunderstorms do not extend very far into the stratosphere. Which of the following conditions of the air in the stratosphere explain this fact?
A. air that is too thin
B. air that is unstable
C. air that is stable
D. air that is too cold
Answer: C
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Indicate whether this statement is true or false.
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a. taiga b. tundra c. permafrost d. broad-leaf forest
A prairie differs from a steppe in that the grasses are
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Why do mantle plumes tend to concentrate beneath supercontinents such as Pangaea?
A) Concentrations of radioactive materials build up as continents assemble. B) Partial melting from subduction concentrates large volumes of magma. C) A large landmass acts as an insulating blanket to trap heat in the mantle. D) Friction from converging landmasses heats up the mantle.