Wild World: Disappearing Lake Quiz

Estimated Completion Time
1 min
In May 2007, a glacial lake in Chile virtually disappeared. In March 2007, the lake was at its usual size of 100 feet deep and about five acres across. What was the lake's name?
Lake Santiago
Lake Talcahuano
It didn't have a name
The disappearing lake, located in Bernardo O'Higgins Park in the southern Andes Mountains, had no name. In fact, it was rarely visited.

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Of the following, which was not left in the wake of the disappearing lake?
slabs of ice
rotting fish
When foresters arrived at the scene of the dried-up lake, they found only slabs of ice and a gaping fissure. What's more, a nearby river had significantly less water flow than it once did.
a gaping fissure

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What are the names of the two shrinking glaciers that primarily fed the lake?
Montt and Taitao
Temuco and Valdivia
The shrinking glaciers Tempano and Bernardo, located in the Magallenes province, used to contribute water to the lake. Glacialologists Gino Casassa and Andres Rivera state that the likeliest cause of the melting glaciers is global warming.
Tempano and Bernardo

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What natural phenomenon occurred in April 2007 that was suspected as a cause of the lake's disappearance?
hurricane
earthquake
On April 21, 2007, an earthquake struck southern Chile, and scientists suspected that the fissure that opened up could have sucked the lake water into the ground.
drought

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Sometimes lake form behind naturally occurring dams made of what?
ice
a moraine
ice or a moraine
Glacial lakes often develop behind natural dams that are made of ice or a moraine, the pile of rock and earth debris a glacier leaves behind.

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In July 2007, scientists were able to definitively determine the cause of the disappearing lake. What was the cause?
too much water
Scientists ultimately determined that too much water was the cause of the lake's disappearance. When the glaciers melted and filled the lake beyond its capacity, the moraine broke and the water flowed out and into the ocean.
lower than average rainfall
abnormally high temperatures

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Lakes in which U.S. state frequently cycle through a process of disappearing and re-emerging?
Michigan
Alaska
Lakes in Alaska frequently go through cycles of draining and refilling, based on the changing seasons or year-long or decades-long intervals.
Hawaii

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Of the following lakes, which has not disappeared and re-emerged?
Florida's Lake Jackson
Georgia's Lake Allatoona
Florida's Lake Jackson and Louisiana's Lake Peigneur have both disappeared and re-emerged. Lake Jackson drains at least once every 25 years, and Lake Peigneur refilled when the direction of Delcambre Canal was accidentally reversed by a Texaco drilling team.
Louisiana's Lake Peigneur

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Lake Peigneur once only measured 11 feet deep, but the reversal of the Delcambre Canal caused the lake to fill up to ___ feet deep.
189
750
1300
Believe it or not, the reversal of the Delcambre Canal caused Lake Peigneur to fill up to a whopping 1,300 feet deep.

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The Salton Sea in _____ was accidentally created when water from the _____ was diverted and breached a canal wall.
Portugal; Sado River
England; Trent River
California; Colorado River
The Salton Sea in California was created in 1905 and '06 when water diverted from the Colorado River breached a canal and filled the Salton Basin. For nearly a year, water flowed into the basin before being closed off, and the Salton Sea was effectively formed.

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You Got:
/10
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