Each year, at least 250,000 children under 6 years of age go blind from a lack of ____.
A. iron
B. calcium
C. vitamin A
D. vitamin B
E. vitamin C
Answer: C
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If the earth's gravitational force were to increase, atmospheric pressure at the ground would:a
increase. b. decrease. c. remain the same. d. cause the atmosphere to expand vertically.
The 1993 flood in the central United States was caused by ________.
A. a single large rainstorm over a large area B. a series of dam failures after an earthquake C. several storms building up excess moisture over several months over much of the Upper Mississippi River Drainage Basin D. rapid melting of record winter snows during the springĀ
Deposits of conventional oil that can be extracted profitably at current market prices with current technology are known as ____________________.
Fill in the blank(s) with the appropriate word(s).
The igneous feature shown in this figure is a
A) dike.
B) sill.
C) volcanic neck.
D) laccolith.