St. Johns River Quiz
Florida’s north-flowing river, its basin, and key cities (10 questions).
St. Johns River Quiz: Quick Study Notes
The St. Johns River is Florida’s longest river, known for its unusual north-flowing direction. This slow-moving, shallow river is a vital ecological artery, draining a vast basin characterized by extensive wetlands and connecting several key cities in the Sunshine State to the Atlantic Ocean.
Key Characteristics
Uniquely flows north for most of its 310-mile length.
Entirely within Florida, it’s the state’s longest river.
Drains a large, shallow basin with diverse freshwater wetlands.
Flows past Jacksonville, Palatka, and near St. Augustine.
Key Takeaways
- The St. Johns River is one of the few major rivers in North America that flows northward.
- It is the longest river entirely within Florida, stretching approximately 310 miles (500 km).
- The river originates in the extensive wetlands of Indian River County and empties into the Atlantic Ocean near Jacksonville.
- Its basin is characterized by a very low gradient, resulting in a slow, meandering flow and a vast network of marshes and lakes.
- Major cities located along the river include Jacksonville, Palatka, Sanford, and it is a significant feature near St. Augustine.
- The St. Johns River supports a rich biodiversity, including manatees, alligators, various fish species, and numerous bird populations.
- Environmental concerns for the river often focus on water quality, particularly nutrient pollution and invasive species.
Frequently Asked Questions
Why is the St. Johns River famous for its flow direction?
The St. Johns River is famous for flowing northward, which is unusual for a major river in North America. This characteristic is due to the very flat topography and gentle slope of its basin.
Where does the St. Johns River originate and end?
The St. Johns River originates in the extensive wetlands of Indian River County, Florida, and flows north, eventually emptying into the Atlantic Ocean east of Jacksonville.
What cities are significant along the St. Johns River?
Key cities located along the St. Johns River include Jacksonville (near its mouth), Palatka, Sanford, and it is an important geographical feature near the historic city of St. Augustine.
What type of ecosystem does the St. Johns River basin support?
The St. Johns River basin primarily supports vast freshwater wetlands, marshes, cypress swamps, and diverse aquatic habitats, making it a critical area for Florida’s biodiversity.
How long is the St. Johns River?
The St. Johns River is approximately 310 miles (500 km) long, making it the longest river entirely within the state of Florida.
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