What geologists call the Basin and Range Province in the United States roughly
coincides in its northern
portions with the geographic province known as the Great
Basin. The Great Basin is
hemmed in on the west by the Sierra Nevada and on the east
Line by the Rocky Mountains; it has
no outlet to the sea. The prevailing winds in the Great
(5) Basin are from the west. Warm,
moist air from the Pacific Ocean is forced upward as it
crosses the Sierra Nevada. At
the higher altitudes it cools and the moisture it carries is
precipitated as rain or snow on
the western slopes of the mountains. That which
reaches the Basin is air wrung
dry of moisture. What little water falls there as rain or
snow, mostly in the winter
months, evaporates on the broad, flat desert floors. It is,
(10) therefore, an environment in
which organisms battle for survival. Along the rare
watercourses, cottonwoods and
willows eke out a sparse existence. In the upland
ranges, piñon pines and
junipers struggle to hold their own.
But the Great Basin has not always been so arid. Many of its dry,
closed depressions
were once filled with water.
Owens Valley, Panamint Valley, and Death Valley were
(15) once a string of interconnected
lakes. The two largest of the ancient lakes of the Great
Basin were Lake Lahontan and
Lake Bonneville. The Great Salt Lake is all that
remains of the latter, and
Pyramid Lake is one of the last briny remnants of the former.
There seem to have been several periods within the last tens of
thousands of
years when water accumulated in
these basins. The rise and fall of the lakes were
(20) undoubtedly linked to the
advances and retreats of the great ice sheets that covered
much of the northern part of
the North American continent during those times. Climatic
changes during the Ice Ages
sometimes brought cooler, wetter weather to midlatitude
deserts worldwide, including
those of the Great Basin. The broken valleys of the Great
Basin provided ready
receptacles for this moisture.
Questions
40. What is the geographical
relationship between the Basin and Range
Province and the Great Basin?
(A) The Great Basin is west of the Basin and Range Province.
(B) The Great Basin is larger than the Basin and Range Province
(C) The Great Basin is in the northern part of the Basin and Range
Province.
(D) The Great Basin is mountainous ; the Basin and Range Province
is flat desert.
41. According to the passage,
what does the Great Basin lack?
(A) Snow
(B) Dry air
(C) Winds from the west
(D) Access to the ocean
42. The word
"prevailing" in line 4 is closest in meaning to
(A) most frequent (B) occasional
(C)
gentle (D)
most dangerous
43. It can be inferred that the
climate in the Great Basin is dry because
(A) the weather patterns are so turbulent
(B) the altitude prevents precipitation
(C) the winds are not strong enough to carry moisture
(D) precipitation falls in the nearby mountains
44. The word "it" in
line 5 refers to
(A) Pacific Ocean
(B) air
(C) west
(D) the Great Basin
45. Why does the author mention
cottonwoods and willows in line 11?
(A) To demonstrate that certain trees require a lit of water
(B) To give examples of trees that are able to survive in a
difficult environment
(C) To show the beauty of the landscape of the Great Basin
(D) To assert that there are more living organisms in the Great
Basin than there
used to be
46. Why does the author mention
Owens Valley, Panamint Valley, and Death Valley
in the second paragraph?
(A) To explain their geographical formation
(B) To give examples of depressions that once contained water
(C) To compare the characteristics of the valleys with the characteristics
of the lakes
(D) To explain what the Great Basin is like today
47. The words "the
former" in line 17 refer to
(A) Lake Bonneville
(B) Lake Lahontan
(C) the Great Salt Lake
(D) Pyramid Lake
48. The word
"accumulated" in line 19 is closest in meaning to
(A) dried
(B) flooded
(C) collected
(D) evaporated
49. According to the passage,
the Ice Ages often brought about
(A) desert formation
(B) warmer climates
(C) broken valleys
(D) wetter weather
50. Where in the passage does
the author explain how lakes probably formed
in the Great Basin?
(A) Lines 6-7
(B) Lines 10-11
(C) Lines 13-14
(D) Lines 21-24
Please
tally your answer with the below provided answers and then comment here how
much you got!
Answers
40.
C 41. D 42. A 43. D 44. B 45.
B 46. B 47. B 48. C 49. D 50. D
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