- 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) River lake
B) Glacial lake
C) Crater lake
D) Artificial lake
- 2. In which country is Lake Nyos located?
A) Gabon
B) Cameroon
C) Central African Republic
D) Nigeria
- 3. What significant event occurred at Lake Nyos in 1986?
A) Earthquake
B) Limnic eruption
C) Flood
D) Volcanic eruption
- 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) Glacial basin
B) River valley
C) Mountain range
D) Volcanic crater
- 6. Which two lakes similar to Lake Nyos are known for limnic eruptions?
A) Lake Superior and Lake Michigan
B) Lake Baikal and Lake Titicaca
C) Lake Victoria and Lake Tanganyika
D) Lake Monoun and Lake Kivu
- 7. What year did the disaster at Lake Nyos take place?
A) 1975
B) 1986
C) 1990
D) 1982
- 8. What is the main cause of high carbon dioxide levels in Lake Nyos?
A) Industrial waste
B) Agricultural runoff
C) Urban pollution
D) Volcanic activity
- 9. Limnic eruptions are caused by the release of gas from what?
A) Atmosphere
B) Surface waters
C) Deep waters
D) Mountain summits
- 10. What other lake is located nearby Lake Nyos?
A) Lake Monoun
B) Lake Chad
C) Lake Toba
D) Lake Geneva
- 11. What is the primary ecological impact of the gas release during the disaster?
A) Increased biodiversity
B) Erosion of soil
C) Growth of algae
D) Death of aquatic and terrestrial life
- 12. What is the primary composition of the water in Lake Nyos?
A) Brackish water
B) Mineral water
C) Freshwater
D) Saltwater
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