- 1. Which country does the Purus River flow through?
A) India
B) Brazil
C) Australia
D) Russia
- 2. Which of the following animals can be found in the Purus River basin?
A) Pink river dolphin
B) Kangaroo
C) Panda
D) Polar bear
- 3. What is the main economic activity along the Purus River?
A) Skiing
B) Fishing
C) Diamond mining
D) Oil drilling
- 4. What is the largest city located on the Purus River?
A) Pucallpa
B) Porto Velho
C) Lábrea
D) Iquitos
- 5. What is the main threat to the biodiversity of the Purus River?
A) Underwater volcanoes
B) Noise pollution
C) Deforestation
D) Alien invasion
- 6. What is the dominant fish species in the Purus River?
A) Tilapia
B) Salmon
C) Carp
D) Arapaima
- 7. What is the average annual rainfall in the Purus River basin?
A) 10,000 mm
B) 500 mm
C) 5,000 mm
D) 2,500 mm
- 8. Which famous naturalist visited the Purus River in the 19th century?
A) Alexander von Humboldt
B) Alfred Russel Wallace
C) Charles Darwin
D) Henry Walter Bates
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