The Mississippi River System Quiz
Tributaries, economic importance (10 questions).
The Mississippi River System Quiz: Quick Study Notes
The Mississippi River System is the hydrological backbone of the United States, draining approximately 41% of the contiguous U.S. It facilitates the movement of billions of dollars in goods annually and supports diverse ecosystems from the North Woods to the Gulf of Mexico.
Key Takeaways
- The system borders or passes through 10 U.S. states.
- It is the second-longest river in North America, flowing roughly 2,340 miles.
- The Ohio River contributes the largest volume of water to the Mississippi.
- New Orleans is a critical port city located near the river’s mouth.
- The U.S. Army Corps of Engineers manages navigation via locks and levees.
What are the two major tributaries of the Mississippi?
The Missouri River (flowing from the west) and the Ohio River (flowing from the east) are the two most significant tributaries in terms of length and water volume, respectively.
Which states border the Mississippi River?
There are 10 states: Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.
What is the main economic function of the river?
It serves as a “marine highway” for transporting heavy bulk commodities like corn, soybeans, oil, and steel via barge, which is cheaper and more fuel-efficient than trucking.
Where does the Mississippi River end?
It ends at the Mississippi River Delta in Louisiana, emptying into the Gulf of Mexico.
Who manages the river’s navigation and flood control?
The U.S. Army Corps of Engineers maintains the shipping channel, locks, dams, and the extensive levee system to prevent flooding and ensure navigability.

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