Watch this video on dissolved oxygen and answer the following questions: https:/
ID: 1712966 • Letter: W
Question
Watch this video on dissolved oxygen and answer the following questions:
https://www.youtube.com/watch?v=oVW5LAzd7Ec
a. What is the law that the narrator is describing that controls how much oxygen moves between the atmosphere and the water? The law governing this process is not mentioned in the video but we talked about it in class previously.
b. Eutrophication occurs in water bodies when excessive nutrients, such as nitrogen and phosphorous enter a water body. Increased nutrients lead to increased growth of algae and nuisance aquatic weeds, which then decay and reduce the available oxygen in the water for aquatic organisms like fish. Describe (at least one sentence each) three possible sources of nutrients that may be of concern near a water body.
Explanation / Answer
a)The law that the narrator is describing is Henry's Law which state that "The amount of dissolved gas is proportional to its partial pressure in the gas phase"
b)1)Use of fertilizer in agriculture.
when storm occurs these fertilizers are washed off into the water body.
2)dumping of muncipal waste into the water body increases the amount of nutrients in water body
3)Use of detergents and soaps:-Domestic runoff which contain detergents and soaps also increases the amount of nutrients in water body.
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