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Geography
World Capitals: Can You Name Them All?
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What is the capital of Australia?
Rivers of the World
Rivers built the first cities and still carry much of the world's trade and water. See how well you know the ten that matter most. Each answer comes with the story behind it.
About this topic
Rivers decided where much of human history happened. Cities grew on their banks, trade moved along their currents, and borders still follow their course. This quiz runs from the longest rivers to the ones with the greatest flow, covering the waterways that shaped continents and the civilizations beside them. The explanations go beyond the raw numbers to why a river matters, whether it is the Nile's role in Egypt or the sheer volume of the Amazon. It is geography with the stories left in, and a good way to see the world through the water that runs across it.
Questions & answers
Rivers of the World: all 10 questions and answers
Every question in this quiz is listed below with its correct answer and the reasoning behind it. Play first if you would rather not see the answers — or read through as a study sheet.
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1Which river is traditionally considered the longest in the world?
- A The Nile Correct
- B The Yangtze
- C The Mississippi
- D The Amazon
Answer: A. The Nile
Why: The Nile in Africa is usually ranked the longest at about 6,650 km, though some studies argue the Amazon may be slightly longer.
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2Which river carries the most water by volume?
- A The Congo
- B The Yangtze
- C The Amazon Correct
- D The Nile
Answer: C. The Amazon
Why: The Amazon discharges more water than the next seven largest rivers combined — roughly a fifth of all river water reaching the oceans.
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3The Yangtze is the longest river on which continent?
- A South America
- B Africa
- C Europe
- D Asia Correct
Answer: D. Asia
Why: At about 6,300 km, the Yangtze is Asia's longest river and the third-longest in the world.
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4The Danube flows through or borders more countries than any other river. Roughly how many?
- A Four
- B Ten Correct
- C Six
- D Two
Answer: B. Ten
Why: The Danube touches ten countries, from Germany to Ukraine — more than any other river on Earth.
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5Which river forms a long stretch of the border between the US and Mexico?
- A The Rio Grande Correct
- B The Pecos
- C The Missouri
- D The Colorado
Answer: A. The Rio Grande
Why: The Rio Grande marks about 2,000 km of the US-Mexico border on its way to the Gulf of Mexico.
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6The Congo is the deepest river in the world. On which continent is it?
- A South America
- B Australia
- C Asia
- D Africa Correct
Answer: D. Africa
Why: The Congo reaches depths of over 220 m, making it the deepest known river, in central Africa.
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7Which river flows through the English capital, London?
- A The Trent
- B The Severn
- C The Mersey
- D The Thames Correct
Answer: D. The Thames
Why: The Thames winds through southern England and London before emptying into the North Sea.
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8The Ganges is considered sacred in which religion?
- A Buddhism
- B Hinduism Correct
- C Shinto
- D Sikhism
Answer: B. Hinduism
Why: The Ganges is revered in Hinduism; millions bathe in it at pilgrimage cities such as Varanasi.
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9Which country is home to the world's largest river delta, the Ganges-Brahmaputra?
- A Bangladesh Correct
- B Vietnam
- C Brazil
- D Egypt
Answer: A. Bangladesh
Why: The vast Ganges-Brahmaputra delta spreads across Bangladesh and eastern India, the largest delta on Earth.
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10The ancient civilization of Mesopotamia grew up between the Tigris and which other river?
- A The Euphrates Correct
- B The Indus
- C The Nile
- D The Jordan
Answer: A. The Euphrates
Why: Mesopotamia means "between rivers" — the land between the Tigris and the Euphrates in modern Iraq.
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