- 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) Polar bear
B) Panda
C) Pink river dolphin
D) Kangaroo
- 3. What is the main economic activity along the Purus River?
A) Diamond mining
B) Oil drilling
C) Fishing
D) Skiing
- 4. 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
- 5. Which famous naturalist visited the Purus River in the 19th century?
A) Henry Walter Bates
B) Alexander von Humboldt
C) Alfred Russel Wallace
D) Charles Darwin
- 6. What is the main threat to the biodiversity of the Purus River?
A) Underwater volcanoes
B) Alien invasion
C) Noise pollution
D) Deforestation
- 7. What is the dominant fish species in the Purus River?
A) Salmon
B) Carp
C) Arapaima
D) Tilapia
- 8. What is the largest city located on the Purus River?
A) Porto Velho
B) Pucallpa
C) Lábrea
D) Iquitos
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