Did you know there are places on earth where boiling hot
steam explodes out of a hole in the ground? This is called a
geyser. In the state of Wyoming, there are at least
two hundred geysers that shoot up out of the ground. The
most famous geyser shoots 11,000 gallons of water -
boiling hot, so it's steam - 150 feet up. For a very long
time this geyser seemed to shoot up regularly, nearly once an
hour. That is how it got its name - "Old
Faithful."
A geyser occurs because beneath the
earth's crust lies a thick layer of hot, melted rock. This
is called the mantle. The deeper the mantle is, the hotter
it gets. At the center of the earth is a core of melted
rock. It gets as hot as 7,000 degrees.
Sometimes holes open in the earth's
crust. When this happens, hot gas and liquid can escape from
deep down in the earth. This is why geysers occur.
Answer the questions below.
"Old Faithful" is located in the state
of
Washington.
Wyoming.
Arkansas.
A geyser is
a thick
layer of hot, melted rock.
where boiling
hot steam explodes out of a hole in the ground.
at the center of the
earth.
The temperature at the center of the earth is
degrees.
The deeper the mantle is the
it gets.
"Old Faithful" shoots boiling steam
feet up into the air.
Wyoming has at least two
geysers.
The mantle of the earth is located
beneath
the earth's crust.
at the center of the
earth.
in a geyser.
"Old Faithful" got its name because
it shoots
up regularly, nearly once an hour.
it rarely shoots up.
it shoots up regularly,
nearly once a month.
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