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