Transcript My PowerPoint on Volcanos

.A volcano is a opening in the earths crust through which molten
lava, ash and gases are ejected from. There are 3 types of
volcano forms
Shielded volcano, Strato volcano and Cinder-Cone volcano
-Shielded volcano=Hawaiian eruptions, the calmest of them all, these
volcanoes have a steady flow of lava that helps to build up and make
these volcanoes so massive
Strato volcano= Highly explosive eruptions, these volcanoes are the
most dangerous and are associated with causing massive destruction.
Cinder-Cone volcano=Associated with a strombolian eruption, shortlived, explosive outbursts of pasty lava that is ejected into the air.
The oldest volcano on earth is approximately
350,000 years old but volcanoes have been around
ever since the earth was formed. When the earth
was formed it was a rocky, hot planet and
everywhere had volcanos on it.
But when the moon was formed by a colliding
planet it destroyed earths volcanos and formed
mountains from the destroyed rubble.
.Crater: The top of the volcano where lava, ashes and gases eject from.
Flank: The side or rear of a volcano where magma flows through.
Throat: A throat of a volcano is where the width of the hole of the conduit
pipe increases. The throat of a volcano gives the magma more space to flow
out/gush out of the mountain as lava
Conduit pipe: The conduit in a volcano is the 'vent' or 'pipe' through which
lava passes through.
Summit: The highest point of a volcano.
Vent: An opening in Earth's surface through which volcanic materials escape.
Parasitic Cone: A small cone-shaped volcano formed by an accumulation of
volcanic debris.
Sill: A flat piece of rock formed when magma hardens in a crack in a volcano.
Ash: Fragments of lava or rock smaller than 2 mm in size that are blasted into
the air by volcanic explosions.
Credit to Resource Woodland for information
Deep inside Earth, between the molten iron core
and the thin crust at the surface, there is a solid
body of rock called the mantle. When rock from the
mantle melts, moves to the surface through the
crust, and releases pent-up gases, volcanoes erupt
Extremely high temperature and pressure cause the
rock to melt and become liquid rock or magma.
When a large body of magma has formed, it rises
through the denser rock layers toward Earth's
surface. Magma that has reached the surface is
called lava
Its volcanic activity was discovered in 1979 by
Voyager 1 imaging scientist. Observations of Io
by passing spacecraft (the Voyagers, Galileo,
Cassini, and New horizons) and Earth-based
astronomers have revealed more than 150
active volcanoes. Up to 400 such volcanoes are
predicted to exist based on these observations
• . The great eruption at Santorini in 1500 BC may be the origin of the
Atlantis myth
• . Pele, Hawaii's goddess of fire, can take many forms.
she is the lava that pours across the ground.
She can also be a white dog, and old woman, or a beautiful young
woman.
• . A man-eating demon named Tamaohoi once lived on the flank of
Mount Tarawera, in New Zealand. He was imprisoned on the
mountain by Ngatoro. Tamaohoi slept for many centuries. Under
the influence of the white man, the morals of the local people
declined until there was a call for Tamaohoi to return and punish
the sinners.Tamaohoi exploded from the mountain and killed many
people in the village of Te Ariki
• .
• Volcanologists study volcanoes they study the
actual process and deposit of a volcanic
eruption but it takes time to do this they have
to collect all data of it, mapping of the
distribution of rocks that make up to a
volcano, as well as chemical and dating
analyses.
• Magma is a mixture of molten rock, which is
formed beneath the earths surface, the
magma its self is not made by the volcano
magma is constant beneath the earth
everywhere as parts of its layers, it helps shift
the plates.
• The Mauna loa volcano in Hawaii is the tallest
active volcano on earth, it is 13,677 feet above
sea level. That makes it taller than MT,
Everest!!. Its last eruption was in 1984 and it
emerged out of sea 400,000 years ago!
• Be aware of mudflows. The danger from a mudflow increases near
stream channels and with prolonged heavy rains. Mudflows can
move faster than you can walk or run.
• Avoid river valleys and low-lying areas.
• Remember to help your neighbours who may require special
assistance – infants, elderly people, and people with disabilities.
Protection from Falling Ash
Listen to a battery-powered radio or television for the latest
emergency information.
These are the few of the many things you need to do during a
eruption.
I appreciate all of your listening and
consideration of my powerpoint!
Bibliography
•
•
•
•
http://www.google.com.au/
www.wikianswers.com/
http://www.wikipedia.com/
www.weatherwizkids.com