In a partially mixed shallow estuary, the net seaward flow occurs at ________.
A. depth only
B. all depths
C. middle depths
D. slack water only
E. the surface only
Answer: E
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Explain the connections between oxygen sag and biological oxygen demand (BOD). Use a drawing in your explanation and use appropriate labels.
What will be an ideal response?
The 20th Century rise of tourism in the Hawaii 'an Islands by Americans from the mainland can be attributed most directly to which of the following?
A) The rapid rise of Hollywood and the movie industry, and the development of "talkies" or movies with sound that were more often filmed in exotic locales. B) The increased use of steamships on the Pacific making many commercial products from the mainland available in Hawaii, allowing mainlanders a respite from rustic Hawaii. C) The development of commercial aviation allowing mainland Americans to take a tropical vacation without leaving the safety and familiarity of the Unites States. D) The embargo of Cuba, which was once a major tourist destination providing gambling, and entertainment for mainland Americans.
Groins are constructed for the purpose of maintaining or widening beaches that are losing sand
Indicate whether the statement is true or false
The original method of processing oil shale involved crushing the rock and then heating it. What environmental problem did this create that the new method (heating the rock in place) seeks to avoid?
A. carbon dioxide emissions B. landslides C. water pollution D. acid rain E. disposing of large volumes of waste rock