________ stations are the minimum needed to determine the location of an earthquake epicenter.
A. Six
B. Two
C. Three
D. Five
E. Four
Answer: C
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Which of these electromagnetic waves has the shortest wavelength?
A) radio waves B) infrared waves C) X rays D) ultraviolet waves E) light waves
Which of the following elements will most likely be shiny and flexible?
A) rhodium (Rh) B) hydrogen (H) C) selenium (Se) D) iodine (I) E) silicon (Si)
Farmers in the Midwestern United States routinely rotate between soybean and corn crops. Sometimes it is said that they do this because the soybeans introduce nitrogen into the soil
Although this is true, farmers also rotate their corn and soybean crops as a form of A) cultural control. B) natural enemies. C) genetic control. D) natural chemical control.
Physical weathering dominates in warm, wet climates
Indicate whether the statement is true or false