Transcript text: Just How Faithful Is Old Faithful?
The name 'Old Faithful' is synonymous with the geologic features known as geysers. But whot, exactly, is a geyser, and how does it work?
How Geysers Start
Our Earth consists of many regions where magma, or hot lava. lies beneath the surface. This magma works like a burner on a stove, hooting any water in the ground until it grows very hot Mast water beneath Earth's surface comes from rain and melting snow. This water passes through cracks in the earth and collects underground. If this water lies close enough to hot magma, it heats and begins to boll:
Why does the author include a section on Yellowstone's Old Faithful?
to introduce the idea that even the most reliable of geysers can be inconsistent
to illustrate the importance of geysers to our natural world and our environment's health
to provide information about geysers and how we can preserve them worldwide
to explain how geysers are formed below Farth : surface and how they erupt