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