Volcanoes are landforms on a
planet that are either dormant,
active or simply dead. When
an active volcano erupts, lava,
a...
When a volcano erupts, lava,
ash and rocks can spew out of
it. Volcanoes erupt because of
a lot of reasons. One reason
is ...
A dormant volcano is a
volcano that doesn’t seem to
show any volcanic activity. It is
in between being active and
being de...
A vent is the place where the
volcano spits out lava, ash
and rocks spew out. It’s
usually on top of the volcano
in the ce...
There are different types of
volcanoes based on their
shape and what they’re made
of. There are Cinder Cone
volcanoes, Shi...
Cinder cone volcanoes are
cone shaped and it’s built
from hardened magma. This
type volcano isn’t known for
it’s eruption ...
Shield volcanoes are built
from hardened lava flows.
These volcanoes are named
Shield Volcanoes because
they are shaped li...
Hot spots are volcanic regions
thought to be fed by mantle
that is strangely hot compared
to the mantle in other places.
I...
Composite volcanoes are, like
it’s name suggests, built of
more than one material. They
are formed by layers of lava
and b...
The Ring of Fire is an area in
the pacific where volcanic and
seismic activity is common.
It’s because the Pacific plate
i...
PACIFIC RING OF FIRE MAP
Volcanoes effect people in a lot of ways.
When a volcano erupts, ash is spewed out
which can make it hard to breathe. Anot...
The word intrusive means
inside so Intrusive Volcanic
Features are features inside
the volcano. There are
Volcanic Necks, ...
A volcanic neck is a land form
that is created magma
hardens in a vent on an active
volcano. When forming, the
neck can ca...
A volcanic sill is a sheet of
magma which is parallel to the
nearby rocks. They store
magma unlike dikes which
transport m...
A dike is a sheet that stores
magma. The thickness of
dikes can range from a few
cm to 1km. A single dike by
itself could ...
There are lots of different
types of energy from inside
the Earth. Geothermal energy
is energy from inside the
earth.
Info...
The word geothermal comes
from 2 Greek words: ‘geo’
meaning inside, and ‘therme’
meaning hot. Geothermal is
energy from in...
Relative age is the age of a
rock compared to the other
minerals that surround it.
Info: http://www.ucmp.berkeley.edu/fosr...
This principle shows that
every layer on the Earth has a
special age. The layer above
another layer is younger than
the on...
The Absolute age is the
almost exact age of a rock or
layer. Determining the
absolute age includes having
to go deep into ...
The Geological Time Scale is
a line of chronological events
that are theorized to have
happened. They are split into
Eras ...
Eras are events that have
happened in the world. They
are split up by major events
such as the Dinosaurs
extinction and th...
Volcanoes
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Volcanoes

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Volcanoes

  1. 1. Volcanoes are landforms on a planet that are either dormant, active or simply dead. When an active volcano erupts, lava, ash and rocks can be released. The Ring of Fire is filled with volcanoes both active and dormant. Picture: http://www.worldvolcanoes.info/wp-content/uploads/2011/11/volcano-krakatoa.jpg Info: http://en.wikipedia.org/wiki/Volcano BC Science 7 Textbook Krakatoa Erupting
  2. 2. When a volcano erupts, lava, ash and rocks can spew out of it. Volcanoes erupt because of a lot of reasons. One reason is because a plug has formed and pressure builds up. This usually leads to a very explosive eruption. Info: http://en.wikipedia.org/wiki/Types_of_volcanic_eruptionsBC Science 7 Textbook
  3. 3. A dormant volcano is a volcano that doesn’t seem to show any volcanic activity. It is in between being active and being dead. A dead volcano shows very similar effects except they will never become active and erupt ever again. There was a volcano in Alaska that seemed to dead but erupted after 1500 years of being dormant. Picture: http://imagecache6.allposters.com/LRG//20/2098/J6R2D00Z.jpg Info :http://en.wikipedia.org/wiki/Volcano#DormantBC Science 7 Textbook A Dormant Volcano
  4. 4. A vent is the place where the volcano spits out lava, ash and rocks spew out. It’s usually on top of the volcano in the centre of a crater. Picture: http://www.damtp.cam.ac.uk/user/dt268/images/fountain.jpg Info: http://www.enotes.com/volcanic-vent-reference/volcanic-ventBC Science 7 Textbook
  5. 5. There are different types of volcanoes based on their shape and what they’re made of. There are Cinder Cone volcanoes, Shield Volcanoes and Composite Volcanoes. Info: http://library.thinkquest.org/17457/volcanoes/types.php Picture: URL On Individual Slides BC Science 7 Textbook Shield Volcano Composite Volcano Cinder Cone Volcano
  6. 6. Cinder cone volcanoes are cone shaped and it’s built from hardened magma. This type volcano isn’t known for it’s eruption because it doesn’t usually kill anyone. Picture: http://www.kilaueaadventure.com/images/Kilauea-Puu_Oo-volcano-eruption-2.jpg Info: http://en.wikipedia.org/wiki/Cinder_coneBC Science 7 Textbook
  7. 7. Shield volcanoes are built from hardened lava flows. These volcanoes are named Shield Volcanoes because they are shaped like shields. Picture: http://vulcan.wr.usgs.gov/Imgs/Jpg/Belknap/Images/Belknap84_belknap_shield_volcano_10-01- Info: http://en.wikipedia.org/wiki/Shield_volcanoesBC Science 7 Textbook
  8. 8. Hot spots are volcanic regions thought to be fed by mantle that is strangely hot compared to the mantle in other places. Info: http://en.wikipedia.org/wiki/Hotspot_(geology)BC Science 7 Textbook Picture: http://www.cotf.edu/ete/images/modules/volcanoes/hotspot2_full.GIF
  9. 9. Composite volcanoes are, like it’s name suggests, built of more than one material. They are formed by layers of lava and bits of rock. Composite volcanoes often end up exceeding over 2500m in height. Between eruptions, these giants are often so quiet, they seem extinct. Picture: http://wapi.isu.edu/envgeo/EG6_volcano/images/shasta.jpg Info: http://library.thinkquest.org/17457/volcanoes/types.composite.phpBC Science 7 Textbook
  10. 10. The Ring of Fire is an area in the pacific where volcanic and seismic activity is common. It’s because the Pacific plate is colliding with the other surrounding plates. Picture: http://www.disaster-survival-resources.com/image-files/pacific-rim-ring-of-fire-map.gif Info: http://geography.about.com/cs/earthquakes/a/ringoffire.htmBC Science 7 Textbook
  11. 11. PACIFIC RING OF FIRE MAP
  12. 12. Volcanoes effect people in a lot of ways. When a volcano erupts, ash is spewed out which can make it hard to breathe. Another thing that volcanoes spit out is lava. Lava is dangerous too but it’s slow and you could probably outrun it. The biggest problem of all is pyroclastic flow. It’s hot gas that’s extremely hot. To add to that, it’s really fast so running away isn’t an option. There are some good stuff too like fun hike if the volcano is dormant or dead and the ash is good for helping plants grow Picture: http://www.neatorama.com/wp-content/uploads/2009/11/cataniaeruption-690255-ga.jpg Info: http://volcano.oregonstate.edu/how-do-volcanoes-affect-peopleBC Science 7 Textbook A volcano erupting near a city
  13. 13. The word intrusive means inside so Intrusive Volcanic Features are features inside the volcano. There are Volcanic Necks, Sills and Dikes. Info: http://www.maroon.com/bigbend/ig/index.html Picture: http://marlimillerphoto.com/images/Ig-25.jpg BC Science 7 Textbook
  14. 14. A volcanic neck is a land form that is created magma hardens in a vent on an active volcano. When forming, the neck can cause a huge build- up of pressure and in the end, lead to a very explosive eruption. Info: http://www.maroon.com/bigbend/ig/index.htmlhttp://en.wikipedia.org/wiki/Volcanic_plug Picture: http://cdn9.wn.com/pd/02/bb/858752bb374869472eab0a97abc6_grande.jpg BC Science 7 Textbook
  15. 15. A volcanic sill is a sheet of magma which is parallel to the nearby rocks. They store magma unlike dikes which transport magma. Info: http://www.maroon.com/bigbend/ig/index.htmlhttp://www.volcanolive.com/sill.html Picture: http://marlimillerphoto.com/images/Ig-25.jpg BC Science 7 Textbook
  16. 16. A dike is a sheet that stores magma. The thickness of dikes can range from a few cm to 1km. A single dike by itself could be over 10km in length. Info: http://www.maroon.com/bigbend/ig/index.html Picture: http://www.decadevolcano.net/photos/santorini/features/santorini_20823.jpg http://www.decadevolcano.net/photos/keywords/dikes.h tm BC Science 7
  17. 17. There are lots of different types of energy from inside the Earth. Geothermal energy is energy from inside the earth. Info: http://www.edinformatics.com/math_science/alternative_energy/geothermal/geothermal_energy_basics.htm Picture:http://www.edinformatics.com/math_science/alternative_energy/geothermal/geoplant1.gifBC Science 7
  18. 18. The word geothermal comes from 2 Greek words: ‘geo’ meaning inside, and ‘therme’ meaning hot. Geothermal is energy from inside the Earth. Scientists usually retrieve this energy near hot places such as volcanoes and hot springs. This form of energy is better for the environment than others like fossil fuels. Picture: http://www.poweredbymothernature.com/wp-content/uploads/2011/09/geothermal_power_plant.jpg Info: http://iceland.ednet.ns.ca/schedule.htmBC Science 7 Textbook Geothermal power plant
  19. 19. Relative age is the age of a rock compared to the other minerals that surround it. Info: http://www.ucmp.berkeley.edu/fosrec/McKinney.html Picture: http://hkss.cedd.gov.hk/hkss/eng/education/gs/hkg/chapter3/figure2.jpg BC Science 7 Textbook
  20. 20. This principle shows that every layer on the Earth has a special age. The layer above another layer is younger than the one below. This can help determine the age of the rocks. Info: http://en.wikipedia.org/wiki/Law_of_superposition BC Science 7 http://evolution.berkeley.edu/evosite/lines/IIIAchronology.shtml http://evolution.berkeley.edu/evosite/lines/images/strat_column.gif
  21. 21. The Absolute age is the almost exact age of a rock or layer. Determining the absolute age includes having to go deep into the structure of the rock or layer. There is a special material inside rocks that eventually disappears over time. Scientists calculate how much of the material has disappeared to figure out the absolute age. Info: http://www.cliffsnotes.com/study_guide/Absolute-Age.topicArticleId-9605,articleId-9590.html
  22. 22. The Geological Time Scale is a line of chronological events that are theorized to have happened. They are split into Eras to organise the time lines even more. Picture: http://upload.wikimedia.org/wikipedia/commons/7/79/Geological_time_spiral.png Info: http://en.wikipedia.org/wiki/Geologic_time_scaleBC Science 7 Textbook
  23. 23. Eras are events that have happened in the world. They are split up by major events such as the Dinosaurs extinction and the start of the rein of mammals. Picture: http://upload.wikimedia.org/wikipedia/en/7/72/Geological_Time_Scale.png Info: http://en.wikipedia.org/wiki/Geologic_time_scaleBC Science 7 Textbook

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