a very predictable geyser at Yellowstone.
Visitors can check a schedule to see the exact time that Old Faithful is going to erupt. There are many other
geysers and boiling springs in the area. Great Fountain Geyser erupts every 11 hours. Excelsior Geyser produces
4,000 gallons of boiling water each minute! Boiling water is 100 degrees Celsius, or 212 degrees Fahrenheit –
that’s very hot! People also like to see the Grand Prismatic Spring. It is the largest hot spring in the park. It has
many beautiful colors. The beautiful colors are caused by bacteria in the water. These are forms of life that have
only one cell. Different bacteria live in different water temperatures. Visiting Yellowstone National Park can be a
week–long vacation or more. It is beautiful, and there are activities for everyone.