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