Old Faithful is a wonderful geyser. It erupts about every hour, winter or summer, day or night. Once every hour, Old Faithful sends a fountain-like column of hot water high into the air.
Old Faithful is in Yellowstone National Park, USA. There are about 200 geysers in this park. The Giant Geyser throws water about 175 feet into the air, but it does not erupt regularly. No one knows when it will erupt. Some geysers erupt several times during an hour. Some may not erupt for months. But Old Faithful is different. It will always erupt once every hour.
It's time for Old Faithful to erupt again. There is a crowd near the geyser. Suddenly we hear a strange noise. Then we see only a small column of water. Gradually it rises higher and higher. Higher and still higher the water rises. It usually rises over 100 feet. For about four minutes this natural fountain sends a giant column of water into the air. Then it gradually dies down. The people hurry away to see the other geysers.
In another hour another crowd will come to see Old Faithful. Again, a small column of water will rise into the air. It will rise higher and higher, then gradually die down. Old Faithful is a good name for this faithful geyser.
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