What Is a Geyser? • a Roll of Mentos Mint Candies, Unopened a Geyser Is a Hot Spring That Sometimes Shoots Water and Steam Into the Air

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What Is a Geyser? • a Roll of Mentos Mint Candies, Unopened a Geyser Is a Hot Spring That Sometimes Shoots Water and Steam Into the Air

No. MSU 15 TRY THIS Make your own 8 foot geyser! Things You’ll Need: What is a geyser? • A roll of Mentos mint candies, unopened A geyser is a hot spring that sometimes shoots water and steam into the air. • A 2-liter bottle of Diet Coke • A piece of paper Geysers form when there are lots of water, heat and narrow channels in the • Tape ground that create a kind of “plumbing” system. Water collects in cracks and • An adult to help you with this tunnels in the ground and when it gets hot and the pressure builds, it shoots out of the ground. Yellowstone has more than 300 geysers, about half of Choose an outdoor location far away from any cars or houses. Care- fully open a 2-liter size bottle of soda pop. Warm diet soda works the world’s total. Yellowstone is actually a large volcano with lots of magma best. Do not shake the bottle before opening. Roll up the piece of Q:beneath it. The magma is liquid rock under the Earth’s surface that heats paper and tape it together to make a tube that fits over the neck of the ground water. Scientists at Montana State University are studying many the soda bottle. Do not tape the paper to the bottle. Open the roll of aspects of the hot springs in Yellowstone, including what kind of things live Mentos mint candy and quickly, but carefully, with the paper tube in in them. place, drop the whole roll of candies into the soda bottle. Move away immediately! Do not stand over the soda bottle when you drop in the Did you know? candy. You will get a face full of soda. The tallest active geyser in the world is Steamboat Geyser The reason the soda erupts is that the surface of the candy is covered found in Yellowstone National Park. Its eruptions can reach with lots of little pits that are places where carbon dioxide bubbles 300 feet tall, as high as the Statue of Liberty! can form and then quickly escape. This is called nucleation. Learn about opportunities to participate in upcoming science activities and events at MSU by visiting Montana.edu/outreach.

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