This cross section shows the location of a septic tank with harmful bacteria and 5 wells. Which well is least likely to become contaminated?
A) Well A
B) Well B
C) Well C
D) Well D
E) Well E
E) Well E
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Which of the following typically happens to visibility after a rainstorm?
A. It deteriorates. B. It improves at first, but then deteriorates. C. It is unaffected. D. It improves.
Which statement accurately describes a turbidity current?
A) a fast, dense current of water and sediment that runs down slopes B) the result of mid-ocean trenches spreading at a fast rate C) a phenomenon associated with violent atmospheric storms at sea D) an event that always occurs at river mouths in shallow water, but does not extend into water more than 50 meters (165 feet) deep
Managing crop competitors and pests has been challenging to agronomists for centuries. One approach, integrated pest management, ________
A) uses only synthetic chemical pesticides B) uses only natural pesticides C) uses no pesticides of any kind D) combines a variety of pesticides to combat the pest E) combines synthetic chemical pesticides with biocontrol techniques
Some rivers naturally carry more water than others. Which of the following best explains why the Amazon River in South America carries 12 times more water than the Mississippi?
A. the Amazon's drainage basin lies mostly within a tropical rainforest B. the Amazon is a much longer river C. there is much less human development along the Amazon D. the Amazon has a much larger channel E. all of the answers listed here