Karst landscapes ________
A) are not found in the United States
B) seldom have steep-sided terrain
C) are usually formed in arid climates
D) can be said to be the same as hydrothermal landscapes
E) are formed by underground processes
Answer: E
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Hydraulic fracturing has
A. caused the price of natural gas to rise. B. eliminated many jobs. C. reduced the number of wells drilled. D. increased the supply of natural gas.
In low latitude (tropical) oceans, primary productivity is limited by ________
A) available sunlight only B) both available sunlight and nutrient supply C) nutrient supply only D) salinity E) water temperature
The constant path that Earth travels in its orbit around the sun describes a surface called the plane of the ______________
a. equinox b. inclination c. ecliptic d. declination
What atmospheric layer is the home of weather, has the greatest density of gas molecules, and has a decrease in temperature with height?
A. mesosphere B. thermosphere C. troposphere D. stratosphere