- Which is the longest river in Brazil?
- A) Paraná
- B) Amazon
- C) São Francisco
- D) Tocantins
- The Amazon River flows into which ocean?
- A) Atlantic
- B) Atlantic
- C) Pacific
- D) Indian
- Which river is known for its incredible biodiversity and is often called the “lungs of the Earth”?
- A) Amazon
- B) Paraná
- C) São Francisco
- D) Madeira
- What is the main tributary of the Amazon River?
- A) Paraná
- B) Negro
- C) Tocantins
- D) Xingu
- The Paraná River is formed by the confluence of which two rivers?
- A) Amazon and Xingu
- B) Paranaíba and Tietê
- C) Negro and Madeira
- D) Tocantins and Araguaia
- Which river is famous for the Itaipu Dam, one of the largest hydroelectric plants in the world?
- A) Paraná
- B) São Francisco
- C) Madeira
- D) Tapajós
- The São Francisco River is known for which feature?
- A) Being the longest river in Brazil
- B) Its historical significance
- C) Flowing through the Amazon rainforest
- D) Its rapids and waterfalls
- Which river is often referred to as the “Rio da Dúvida” or “River of Doubt”?
- A) Xingu
- B) Madeira
- C) Roosevelt
- D) Tocantins
- Which river forms part of the border between Brazil and Paraguay?
- A) Paraná
- B) Amazon
- C) Tocantins
- D) Araguaia
- What is the main characteristic of the Rio Negro?
- A) It is the widest river in Brazil
- B) It has a high salinity level
- C) It has dark waters
- D) It flows through arid regions
- Which river is known for its unique black-water ecosystem?
- A) Paraná
- B) Rio Negro
- C) Madeira
- D) São Francisco
- The Tapajós River is a tributary of which larger river?
- A) Amazon
- B) Paraná
- C) São Francisco
- D) Tocantins
- Which river is essential for transportation in the Amazon Basin?
- A) Amazon
- B) Paraná
- C) Tocantins
- D) Araguaia
- The Madeira River is formed by the confluence of which rivers?
- A) Xingu and Tapajós
- B) Mamoré and Beni
- C) Paraná and Tietê
- D) Tocantins and Araguaia
- Which river has the largest drainage basin in the world?
- A) Paraná
- B) Congo
- C) Amazon
- D) Yangtze
- What is the main feature of the São Francisco River?
- A) It flows through the Amazon rainforest
- B) It has numerous rapids and waterfalls
- C) It is a black-water river
- D) It is entirely navigable
- Which river’s name translates to “Big River” in Portuguese?
- A) Amazonas
- B) Paraná
- C) São Francisco
- D) Tocantins
- Which Brazilian river is known for its spectacular waterfalls, including the famous Iguaçu Falls?
- A) São Francisco
- B) Madeira
- C) Paraná
- D) Tapajós
- The Tocantins River flows into which body of water?
- A) Atlantic Ocean
- B) Araguaia River
- C) Amazon River
- D) Paraná River
- Which river is home to the largest hydroelectric plant in Brazil, the Belo Monte Dam?
- A) Amazon
- B) Xingu
- C) Paraná
- D) Madeira
- What is a significant environmental concern related to the Amazon River?
- A) Overfishing
- B) Deforestation
- C) Pollution
- D) Climate change
- The Xingu River is a tributary of which river?
- A) Amazon
- B) Paraná
- C) São Francisco
- D) Tocantins
- Which river flows primarily through the northeastern region of Brazil?
- A) Paraná
- B) Tocantins
- C) São Francisco
- D) Madeira
- The Araguaia River is notable for which feature?
- A) It is the longest river in Brazil
- B) It creates a large archipelago
- C) It flows into the Atlantic Ocean
- D) It has many hydroelectric dams
- Which river is known for its rich variety of fish species?
- A) Paraná
- B) Amazon
- C) São Francisco
- D) Tocantins
- The Pantanal region is primarily associated with which river?
- A) São Francisco
- B) Paraná
- C) Paraguay
- D) Amazon
- Which river is an important water source for agriculture in Brazil?
- A) São Francisco
- B) Amazon
- C) Tocantins
- D) Paraná
- The Guaporé River is known for forming a natural border between Brazil and which country?
- A) Bolivia
- B) Paraguay
- C) Argentina
- D) Peru
- What is the primary economic use of the Amazon River?
- A) Agriculture
- B) Mining
- C) Transportation
- D) Fishing
- The Roraima River is a tributary of which larger river system?
- A) Paraná
- B) Orinoco
- C) Amazon
- D) São Francisco
| River Name | Length (km) | Major Features | Drainage Basin | Notable Locations |
| Amazon | 4,345 | Largest river by discharge, immense biodiversity | Amazon Basin | Manaus, Belém |
| Paraná | 4,880 | Forms part of the border with Paraguay; contains Itaipu Dam | Paraná Basin | Foz do Iguaçu, Curitiba |
| São Francisco | 3,160 | Historical significance; vital for irrigation | São Francisco Basin | Juazeiro, Petrolina |
| Tocantins | 2,640 | Important for hydroelectric power | Tocantins-Araguaia Basin | Palmas, Porto Nacional |
| Negro | 2,250 | Dark water river, rich in fish species | Amazon Basin | Manaus, São Gabriel |
| Madeira | 3,380 | Major tributary of the Amazon; hydroelectric potential | Amazon Basin | Porto Velho, Guajará-Mirim |
| Xingu | 1,200 | Home to diverse ecosystems | Amazon Basin | Altamira, Xingu National Park |
| Paraguay | 2,621 | Forms part of the border with Paraguay | Paraguay Basin | Corumbá, Porto Murtinho |
| Araguaia | 2,627 | Known for its archipelagos | Araguaia-Tocantins Basin | Aruanã, Praia do Araguaia |
| Tapajós | 1,200 | Major tributary known for biodiversity | Amazon Basin | Santarém, Itaituba |