This week, we learned about one of our most vital resources, water.  We also learned about the atmosphere and nutrient pollution.  For your Unit 4 Complete assignment, write a narrative essay (minimum 1000 words) in which you address and discuss the questions and statements listed below.  Use at least three scholarly sources and remember to demonstrate a thorough understanding of the READ and ATTEND sections in your essay.  Cite your sources in APA format. 

  • Over 70% of the earth’s surface is covered by water.  What percentage of that water is fresh and why is most fresh water unavailable for direct use by organisms?
  • Describe the zones of aquifers and how the water table changes over time. 
  • Discuss freshwater wetlands.  Name three types and describe their function in nature.
  • Describe littoral, photic, benthic, and pelagic zones in the ocean.
  • Discuss the four layers of the atmosphere.
  • What are the effects of excessive nutrient pollution in surface water ways?


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Joseph Mathenge

Author Since: February 25, 2021