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About This QuizYellowstone is unbeatable for anyone who loves the great outdoors -- even for those who prefer to see the great outdoors from the comfort of a car. From bison to bears to bobcats, and a whole lot of geothermal goodness, Yellowstone's got it all.
How long have people inhabited the area encompassed within Yellowstone National Park?
Native Americans lived and hunted in the Yellowstone area for at least 11,000 years before the land was set aside for the public trust.
What year did Yellowstone become the world's first national park?
In 1872, the United States' 42nd Congress declared Yellowstone a national park and President Ulysses S. Grant signed the act into law.
When the Yellowstone supervolcano erupted for the first time about 2.1 million years ago, how strong was the blast compared to that of Mount St. Helens in 1980?
about 600 times the amount of mass was ejected
about 1,200 times the amount of mass was ejected
about 2,400 times the amount of mass was ejected
According to the National Park Service, when Yellowstone's supervolcano exploded in the park for the first time it spewed roughly 2,400 times the amount of mass that Mount St. Helens managed in 1980. The last time there was actual lava flow in the park was around 70,000 years ago, and the last caldera-forming eruption occurred about 640,000 years ago. All in all, as the Yellowstone region has gradually passed over this volcanic hotspot, it has been the scene of three caldera-forming explosions, which taken together ejected enough lava and ash to top off the Grand Canyon.
How large is the most recently formed caldera?
about 20 by 60 miles (around 30 by 95 kilometers)
about 30 by 50 miles (around 50 by 80 kilometers)
Although sources vary on the exact size of the caldera basin, most put its dimensions somewhere around 30 by 50 miles in size.
about 40 by 70 miles (around 65 by 110 kilometer)
Yellowstone is home to what percentage of the world's hydrothermal features?
According to the National Park Service, Yellowstone sports about half of the planet's hydrothermal features, including more than two-thirds of its geysers. Hot springs, mudpots and fumaroles make up the rest -- numbering more than 10,000 when all's told.
What are fumaroles?
hissing vents of hot, gassy steam
Fumaroles are a lot like hot springs, only they're so hot the water boils away before it can reach the surface so only steam and gases pour out. The Black Growler Steam Vent is the hottest fumarole in the park -- it ranges between 199 degrees and 280 degrees Fahrenheit (93 and 138 degrees Celsius).
calm pools of warm, salty water
bubbling puddles of cold, stinky mud
How fast can bison run?
10 miles per hour
20 miles per hour
30 miles per hour
Bison have lived continuously in the Yellowstone area since prehistoric times. Visitors to the park will often see Yellowstone's herds calmly milling around with little regard for the spectators gawking from their cars. But don't be fooled; despite being around 1,000 to 2,000 pounds when fully grown, bison can run up to 30 miles an hour and turn on a dime. (That's about 450 to 900 kilograms and 50 kilometers an hour.) So it's important to give these big beasties some space!
What is the tallest active geyser in Yellowstone?
Geysers come and go, and some have surpassed Steamboat Geyser in the past, but it currently takes the cake for tallest active geyser in the park -- and the world, in fact. When the geyser has a major eruption, it can shoot water more than 300 feet (91 meters) into the air. Major eruptions are highly variable however. Since 1878, 166 have been recorded with the intervals between ranging all the way from 4 days to 50 years.
What gives color to the Mammoth Hot Springs?
The Mammoth Hot Springs' terraces are formed out of travertine, which is bright white when first deposited and weathers into gray. The striking colors of the terraces come from the bacteria, algae and other microorganisms that find the environment copasetic.
How many people visit Yellowstone each year?
about 1 million
about 3 million
From the first couple hundred people who came to the park the year it was founded, the number of visitors has grown to about 3 million a year in recent years.
about 9 million
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