- 1. Lake Nyos, a crater lake located in the Northwest Region of Cameroon, is renowned for its beauty and the tragic events surrounding it. Nestled in a volcanic crater, the lake is adorned with stunning scenic views and surrounded by lush vegetation, attracting both scientists and tourists. However, its serene surface hides a potent danger beneath; in 1986, a catastrophic limnic eruption released a lethal cloud of carbon dioxide that claimed the lives of over 1,700 people and countless animals in the surrounding villages. This incident highlighted the potential hazards of deep lakes that accumulate dissolved gases from volcanic activity. Lake Nyos is approximately 1,500 years old, and its unique geological characteristics continue to intrigue researchers who seek to understand its behavior and prevent future disasters. Despite its ominous reputation, Lake Nyos remains a natural wonder, illustrating the duality of nature's beauty and peril.
What type of lake is Lake Nyos?
A) Artificial lake
B) Glacial lake
C) River lake
D) Crater lake
- 2. In which country is Lake Nyos located?
A) Cameroon
B) Central African Republic
C) Gabon
D) Nigeria
- 3. What significant event occurred at Lake Nyos in 1986?
A) Flood
B) Limnic eruption
C) Volcanic eruption
D) Earthquake
- 4. What gas was released during the Lake Nyos event?
A) Carbon dioxide
B) Sulfur dioxide
C) Methane
D) Hydrogen sulfide
- 5. What formation surrounds Lake Nyos?
A) River valley
B) Mountain range
C) Volcanic crater
D) Glacial basin
- 6. Which two lakes similar to Lake Nyos are known for limnic eruptions?
A) Lake Superior and Lake Michigan
B) Lake Monoun and Lake Kivu
C) Lake Baikal and Lake Titicaca
D) Lake Victoria and Lake Tanganyika
- 7. What year did the disaster at Lake Nyos take place?
A) 1986
B) 1982
C) 1990
D) 1975
- 8. What is the main cause of high carbon dioxide levels in Lake Nyos?
A) Urban pollution
B) Agricultural runoff
C) Volcanic activity
D) Industrial waste
- 9. Limnic eruptions are caused by the release of gas from what?
A) Atmosphere
B) Mountain summits
C) Surface waters
D) Deep waters
- 10. What other lake is located nearby Lake Nyos?
A) Lake Geneva
B) Lake Monoun
C) Lake Chad
D) Lake Toba
- 11. What is the primary ecological impact of the gas release during the disaster?
A) Increased biodiversity
B) Death of aquatic and terrestrial life
C) Erosion of soil
D) Growth of algae
- 12. What is the primary composition of the water in Lake Nyos?
A) Mineral water
B) Saltwater
C) Brackish water
D) Freshwater
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