8. What two characteristics affect current flows in the ocean? How might global warming affect this?
9. What is a positive feedback? Give an example related to global warming.

10. What is a negative feedback? Give an example related to global warming.
11. What may eventually happen to the Maldives if the earth's temperature
continues to increase?
12. If the sea levels were to rise, in what region of the world would most
people drown? Why?

Humans have built artificial levees along the mississippi river to protect themselves and their property from floods. however, these structures also modify inland and coastal regions by disrupting the natural flow of sediment. artificial levees along the mississippi river a. reduce the amount of sediment deposited on floodplains and increase the amount of sediment deposited at the river's mouth. b. increase the amount of sediment deposited on floodplains and decrease the amount of sediment deposited at the river's mouth. c. increase the amount of sediment deposited on floodplains and at the river's mouth. d. decrease the amount of sediment deposited on floodplains and at the river's mouth.