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A gap between the Uintas and the main body of the Rocky Mountains marks the drainage area of
the Colorado's major tributary, the _____ River, which extends northward into Wyoming. Only
the gently sloping surface of the of the Great Divide Basin separates this river from the
headwaters of the North Platte. - CORRECT ANSWER: Green
A Phoenix-area community, _____, was created in 1916 by the Goodyear Tire and Rubber
Company, which converted thousands of acres of desert land to the production of irrigated, long-
staple cotton (pima cotton), which at one time was considered essential in the manufacture of
automobile tires. - CORRECT ANSWER: Litchfield Park
Air settling from the Mojave Desert downslope through _____ Pass and into the Salton Trough
creates a rush of wind sufficient to turn the blades of more than 2,500 wind turbines placed there
to generate electricity. - CORRECT ANSWER: San Gorgonio
Although skiing was the main attraction to outsiders, the ski industry itself was secondary to
_____ development in most of the western Rocky Mountains, and so it has remained. -
CORRECT ANSWER: real estate
Apart from small irrigated sections, such as the peach orchards near _____, Colorado, and the
San Juan meadows of northern New Mexico, the Colorado Plateau region lacks suitable
agricultural land, even though it does possess adequate irrigation water. - CORRECT ANSWER:
Grand Junction
As elsewhere in the West, vegetation and land use in the Sonoran Desert are determined largely
by elevation and: - CORRECT ANSWER: slope aspect
, As specified in the reading, the Mogollon Rim receives enough moisture to support the growth of
an open, _____forest. - CORRECT ANSWER: ponderosa pine
Because succulent plants contain _____, they are especially vulnerable to freezing and are often
found only on the lowest desert slopes. The saguaro is perhaps the best-known desert cactus. -
CORRECT ANSWER: water
By the time the Pacific Railroad Act was passed in 1862, the chosen route crossed _____, not
New Mexico and Arizona. - CORRECT ANSWER: Wyoming and Utah
Colorado now ranks eighth among the states in natural gas production and has _____ of the fifty
largest natural gas formations in terms of reserves. Pipelines carry Colorado natural gas to
southern California and the Pacific Northwest. - CORRECT ANSWER: five
Ever since John Wesley Powell wrote about his 1869 experience, the Colorado River has
attracted mainly those who seek adventure. Except for _____, the river has never been a route for
transportation or trade. - CORRECT ANSWER: its lower reaches
Geologically, the Sonoran Desert is part of the _____ section, and thus it exhibits the same
characteristic topography of low, widely spaced mountain ridges. - CORRECT ANSWER: Basin
and Range
Grand Canyon was set aside as a national park in 1919. _____ National Parks in Utah, which
also offer examples of differentially eroded sandstones, limestones, and shales into castellated
rock formations, were established shortly thereafter. By the 1990s, national parks and recreation
areas enveloped most the Colorado River as well as some of its tributaries. - CORRECT
ANSWER: Zion and Bryce Canyon
Hopi religious beliefs and social organizations, as well as their matrilocal residence pattern and
their habits of egalitarianism and village autonomy, have attracted generations of _____ to the
mesa-edge villages. - CORRECT ANSWER: cultural anthropologists