The fact that water expands as much as 9 percent of its volume as it freezes is the basis of
A) chemical weathering processes.
B) pressure-release jointing.
C) crystallization.
D) frost wedging.
Answer: D) frost wedging.
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The most variable of the atmospheric gases is ____, which can range from 0.02% to 4% by volume
a. oxygen b. nitrogen c. water vapor d. carbon dioxide e. argon
Which of the following is not one of the major groups of terrestrial vegetation biogeographers often designate?
A) grassland B) forest C) savanna D) desert E) phytoplankton
The "world ocean" spreads over ________ of Earth's surface
A) 1 percent B) 25 percent C) 75 percent D) 90 percent E) 100 percent
Even though a tremendous amount of the sun's energy strikes the Earth every day, why doesn't the Earth overheat?
A) Much of the heat melts rocks, forming lava deep inside the Earth. B) Most of the energy is used in photosynthesis to help plants grow and survive. C) The energy mostly is absorbed in various weather systems. D) The energy is ultimately radiated back to space.