What factors are necessary in order for a karst landscape to form?
The most important factor is soluble bedrock, such as limestone. Climate also plays a role—a warm, humid climate with ample precipitation is most conducive to karst development. In arid climates, karst features are typically absent or are not well developed, although some arid regions have karst features that originated during previous periods of geologic time when the climate was much wetter. Compared with colder humid climates, warmer humid climates have greater amounts of vegetation, which supplies carbon dioxide to subsurface water. Carbon dioxide is necessary for carbonation of limestone and it increases the acidity of water, which encourages solution in general.
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Moose, lynx, and burrowing rodent species are most likely found in which of the following?
A. temperate grasslands B. deserts C. boreal forests D. tropical forests E. savannahs
The gravity model predicts that the optimal location of a service is
A) directly related to the number of people and services in the area and inversely related to the lengths of highways and railways that access it. B) directly related to the range in the area and inversely related to the hinterland. C) directly related to the number of people in the area and inversely related to the distance people must travel to access it. D) directly related to the median of people in the area and inversely related to the meridian of people who travel to access it. E) directly related to the distance people must travel and inversely related to the number of people in the area.
Advection cells move magma or molten material around in the Asthenosphere
Indicate whether the statement is true or false
Lines of longitude are numbered from 0° to ____ (E and W)
a. 15° b. 360° c. 270° d. 180° e. 90°