During sandstorms, how high can sand be lifted into the air?
A)a few centimeters
B)about 50 centimeters
C)about one meter
D)about 10 meters
E)hundreds of meters
C
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Flat-topped seamounts that once rose near or above sea level are called ____
A) ridges B) island arcs C) guyots D) abyssal hills
How is sound transmitted through a medium?
A) By rapid vibrations of molecules B) By rapid temperature changes in a medium C) By rapid pressure changes in a medium D) All of these choices
How many milligrams (mg) are there is 1 kilogram (kg)?
A) 1 x 10^-12 B) 1 x 10^-6 C) 1 x 10^6 D) 1 x 10^1
About 80 percent of E-waste is shipped overseas
A. primarily to China. B. as a result of a treaty that allows countries to send such waste to other countries that might benefit from the source of materials. C. where unprotected workers break it apart to retrieve valuable materials. D. primarily to China where unprotected workers break it apart to retrieve valuable materials.