What is eutrophication?
a. A set of physical, chemical, and biological changes in an environment when there is an
excessive release of nutrients in the water
b. A large plankton bloom dominated by one species
c. The removal of oxygen from the water of an area
d. The manmade changes to the environment
ANS: A
The extra nutrients often come from sewage and fertilizers. Eutrophication occurs at the mouths of
almost all the world's rivers. Information can be found in the section Marine Pollutants May Be
Natural or Human Generated.
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Fly to Point 3. Click the “+” button on the Zoom control to move in closer to this sharp turn called “Bowknot Bend” along the Green River. Using the forward arrow on the Move control, fly over the landscape until you have a clear view of Point 3 along the river bottom. From this angle, it may appear that clouds are draped over the ridge between the tight loops in the river’s course. The historical imagery you see was taken in 2003 from a vantage point nearly directly overhead of this area and the clouds were not really this low to the ground, so why do the clouds appear this way in Google Earth™?
What will be an ideal response?
Over the past few hundred years, sea level as a whole has risen on Earth, at about ________ along coasts that are otherwise stable
A) 2 millimeters per year B) 5 millimeters per year C) 10 millimeters per year D) 15 millimeters per year E) 25 millimeters per year
Which of the following is a common characteristic of carbonate rocks?
A. They are commonly reddish. B. They commonly have a dissolved appearance. C. They are commonly black and shiny. D. They do not form cliffs. E. All of these.
What best explains how crude oil is different from natural gas?
A. is a less dense form of energy B. consists of longer chains of hydrocarbon molecules C. produces less greenhouse gasses D. produces less amount of heat E. is found both onshore and in marine deposits