Air pressure is due to the
A. speed of the wind.
B. force of the wind.
C. weight of overlying air.
D. weight of water vapor in the air.
Answer: C
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In the accompanying hydrograph for a major river, a flood was caused by a single episode of heavy rainfall 50 kilometers upstream. When did the rain most likely occur?
A) At time A
B) At time B
C) At time C
D) At time D
In a region of eastern Washington State known as the Palouse, farmers grow wheat on steep, sloped hills. Which of the following agricultural practices might be of greatest benefit in this region?
A) Use of shelterbelts B) Contour strip farming C) Irrigation D) Repeated plowing
Which of the following is a basic structural component of the most common mineral group?
a. a sulfate ion b. a water molecule c. a silicon-oxygen tetrahedron d. metallic bonds e. a carbonate ion
How do changes in glacier volume on land affect sea level?
What will be an ideal response?