How much of the water on earth is fresh?Help with Science homework

1.)How much of the water on earth is fresh? Why is most of the fresh water unavailable for direct use by organisms?

2.)Describe the zones of aquifers and how the water table changes its position over time.

3.)Use your own words to describe the terms runoff, watershed, and floodplain.

4.)Thoroughly describe the littoral, benthic, and limnetic zones of a lake.

5.)What are wetlands? Name two types of wetlands and describe their functions in nature.

6.)Thoroughly describe the intertidal, littoral, photic, benthic, and pelagic zones in the ocean.

7.)Use your own words to describe the four layers of the atmosphere starting at the surface of the planet and going up in altitude.

8.)Describe the movement of air in Hadley cells. Describe the movement of air in Ferrell cells.

9.) Why is indoor air pollution typically more dangerous than outdoor air pollution? What is the most common indoor air pollutant in the developed world? What about in developing nations?

10.)Thoroughly describe the effects of excessive nutrient pollution in surface water ways.

Must be cited in APA format. Minimum 1,500 word total for these ten quwith four scholarly sources. I also have attach the textbook.

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