Greetings from America

Old Faithful Geyser

Yellowstone National Park

Elements of a GeyserSiliceous: made of silica (silica is used to make glass)Sinter: sediment deposited by a mineral springExtensive: covering a large areaFracturing: breakingPermeable: allows gas or liquids to pass through

How many geysers are there in the world?

600 - 700

How many geysers are in Yellowstone National Park?

400 - 500

Water is heated by magma; steam rises from the heated water.

Pulses of water surge upward.

The surface of the pool is broken.

Water shoots upward and falls back to Earth.

Old Faithful at Night

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