General Information
 

* A volcano is something
that occurs on the surface
of Earth and causes deaths
and destroys homes. A
volcano is when rock from
the mantle melts and moves
to the surface through the
crust and releases pent-up
gases. High temperatures
and pressure causes the
rock to melt and become
magma. Magma is underneath
the Earth's surface.
    When there is to much magma,
energy inside the Earth, that it            A Volcano's Hazard
pushes the magma through the
vent on the volcano. The vent        *A volcanic hazard is when an area
is the hole on the top of the               in danger of damage from the
volcano. When magma reaches         volcano. An area close to a volcano
the Earth's surface it becomes          is hazardous. A house 60 km. away
lava.                                                  has the same risk of damage
      Magma comes in different           done by a volcano with a house
compositions. There are many          at the summit of a volcano.
types of magma. There are many
types of magma because all rocks
are made of different minerals and
melt at different temperature levels.

  Signs that an Eruption is
            Necessary

* When a volcano erupts we find signs
before it erupts. Sometimes
a volcano can go off without warning
Steam Blast eruptions are capable to
occur with little or no warning.
Magmatic  Eruptions usually make
earthquakes as  it rises up from underneath
the ground. Or it could deform the
Earth's surface or change the temperature
in Spring waters.
 

Causes of Eruptions

* Magma is lighter than solid
rock. So it will rise above the
solid rocks around it. Some of the
magma collects in magma chambers
that fuels the volcanos. The reason
why the gases in the magma expand
is because the pressure decreases as
the magma goes up to the surface.
 
 
 
 

                          Two Paragraph Summary
                                                                    On Two Volcanos
 

                                              The Sete Cidades is found in Africa. This volcano
                             is 37.9 North and 25.8 West. It rises up to an incredible
                             2,807 Ft.  This volcano is a stratovolcano with a summit
                            caldera. The Sete Cidades has erupted eight times.
                                    The eruption of 1638 made the islet of Sabrina. Six
                            of the eruptions from the Sete Cidades were from vents
                            west of the volcano. Subaerial eruptions have a large
                             explosive event on the southwest side of the caldera.
                              The most recent eruption was from a submarine vent in
                                1880.
                               Mount Terror is found in Anartica. This volcano is a
                            Basaltic shield that forms part of Ross Island. Most of
                            this volcano is under snow and ice. Mount Terror is found
                            in 77.1 South and 168.5 East. This volcano is an astounding
                            10,700 ft.
                                    Low areas on the east side of this volcano have been
                            studied. Rocks at the summit haven't been studied. Dates
                            for these rocks range from 0.82 and 1.75 million years.
 
 

This is a picture of the  Sete Cidades volcano
 
 
 

 
This is Mount Terror.