The Ultimate Lake Baikal Quiz

The Ultimate Lake Baikal Quiz
Image: Pathompat Meelarp/Moment/Getty Images

About This Quiz

You may not have heard of Lake Baikal -- it is in Siberia, after all -- but it has quite an impressive rap sheet. Lake Baikal holds a whopping 20 percent of the world's fresh, unmelted surface water, and it's the deepest, oldest lake in the world.
How deep is Lake Baikal?
about half a mile (0.8 kilometers) deep
about a mile (1.6 kilometers) deep
Lake Baikal maxes out at about 1 mile in depth (slightly more than 1.6 kilometers).
about 2 miles (3.2 kilometers) deep

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How old is Lake Baikal?
about 20,000 years old
around 2 million years old
at least 25 million years old
No one is exactly sure how long Lake Baikal's been around, but it's estimated to be at least 25 million years old, and some high-end estimates range up to 50 million years old. That's even more impressive when you figure most freshwater lakes on Earth aren't more than about 20,000 years old.

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Lake Baikal is located in a rift valley. Is the rift still spreading?
yes
The continental rift Lake Baikal is located in is one of the deepest actively spreading rifts on Earth. Given a great deal of time, it could even tear Asia apart.
no
unknown

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How much water is in Lake Baikal?
about 150 cubic miles (625 cubic kilometers)
about 350 cubic miles (1,450 cubic kilometers)
about 5,500 cubic miles (23,000 cubic kilometers)
There are about 5,500 cubic miles (23,000 cubic kilometers) of water in Lake Baikal -- nearly the same amount as in all the Great Lakes combined.

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How long is Lake Baikal's shoreline?
about 700 miles (1,126 kilometers) in length
about 1,300 miles (2,100 kilometers) in length
Long and narrow in shape, Lake Baikal has about 1,300 miles (2,100 kilometers) of shoreline.
about 1,700 miles (2,735 kilometers) in length

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How many tributaries feed into Lake Baikal?
about 30
about 300
More than 300 tributaries contribute water to Lake Baikal's water supply, although it's drained through only a single source: the Angara River.
about 3,000

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How many endemic species live in Lake Baikal?
dozens
hundreds
more than a thousand
More than a thousand species are unique to Lake Baikal and live nowhere else in the world, making it a major biodiversity hotspot. This includes the planet's only species of exclusively freshwater seals.

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What happens when Golomyanka fish are exposed to sunlight or temperatures warmer than around 41 degrees Fahrenheit (5 degrees Celsius)?
They melt.
Golomyanka, the most common fish in Lake Baikal, melt into a puddle of fatty oil and bones if exposed to sunlight or warm temperatures. Their high fat content, however, along with their porous bone structure and lack of a swim bladder, make them adept at traversing the lake's vertical water column and extreme pressure differentials.
They mate.
They attack.

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What causes the mysterious ice circles that occasionally appear on the frozen surface of Lake Baikal?
methane gas
It’s thought that methane gas emissions cause the large circles on the ice of Lake Baikal, patterns often spotted by astronauts and satellites. The gas warms the water, causing it to rise. When the water then begins to rotate because of the Coriolis effect, it melts the ice in a vast ring shape.
carbon dioxide
aliens

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What year did Baikalsk Pulp and Paper Mill begin operations on the shore of Lake Baikal?
1944
1966
The Baikalsk Pulp and Paper Mill first started operating in 1966, despite a large public outcry. Scientists and environmentalists are still concerned with the decades-long effect of the mill’s pollutants (as well as other industry and human pollutants) on the lake’s unique ecosystem. The effects of climate change are also a major worry.
1988

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You Got:
/10
Pathompat Meelarp/Moment/Getty Images

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