National Geographic Bee Practice Test

The Amazon River holds the title of the longest river in South America and is often considered the largest river in the world by volume. Flowing over 4,000 miles (approximately 6,400 kilometers), it runs primarily through Brazil, but also traverses Peru and Colombia before emptying into the Atlantic Ocean. The Amazon basin is notable for its vast rainforest and incredible biodiversity, making the river a vital ecological and geographical feature of the continent.

In contrast, while the Nile River is often mentioned in discussions about the longest rivers globally, it is located in northeastern Africa, not South America. The Paraná River, while significant, is considerably shorter than the Amazon and primarily runs through countries like Brazil, Paraguay, and Argentina. The Orinoco River, another notable river in South America, also does not compare in length to the Amazon; it mainly flows through Venezuela and Colombia. Hence, the Amazon's extensive stretch and critical role in the continent's ecosystem solidify its distinction as the longest river in South America.