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  • 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. Krakatoa EruptingInfo: BC Science 7 TextbookPicture: http://www.worldvolcanoes.info/wp-content/uploads/2011/11/volcano-krakatoa.jpghttp://en.wikipedia.org/wiki/Volcano
  • 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_eruptions Science 7 Textbook BC
  • 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 A Dormant Volcano erupted after 1500 years of being dormant.Info :http://en.wikipedia.org/wiki/Volcano#Dormant BC Science 7 TextbookPicture: http://imagecache6.allposters.com/LRG//20/2098/J6R2D00Z.jpg
  • 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.Info: http://www.enotes.com/volcanic-vent-reference/volcanic-vent Science 7 Textbook BCPicture: http://www.damtp.cam.ac.uk/user/dt268/images/fountain.jpg
  • 5. There are different types of Shield Volcano volcanoes based on their shape and what they’re made of. There are Cinder Cone volcanoes, Shield Volcanoes and Composite Volcanoes. Composite Volcano Cinder Cone VolcanoInfo: http://library.thinkquest.org/17457/volcanoes/types.php BC Science 7 TextbookPicture: URL On Individual Slides
  • 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.Info: http://en.wikipedia.org/wiki/Cinder_cone Science 7 Textbook BCPicture: http://www.kilaueaadventure.com/images/Kilauea-Puu_Oo-volcano-eruption-2.jpg
  • 7. Shield volcanoes are built from hardened lava flows. These volcanoes are named Shield Volcanoes because they are shaped like shields.Info: http://en.wikipedia.org/wiki/Shield_volcanoes C Science 7 Textbook BPicture: http://vulcan.wr.usgs.gov/Imgs/Jpg/Belknap/Images/Belknap84_belknap_shield_volcano_10-01-
  • 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) Science 7 Textbook BCPicture: http://www.cotf.edu/ete/images/modules/volcanoes/hotspot2_full.GIF
  • 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.Info: http://library.thinkquest.org/17457/volcanoes/types.composite.php C Science 7 Textbook BPicture: http://wapi.isu.edu/envgeo/EG6_volcano/images/shasta.jpg
  • 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.Info: http://geography.about.com/cs/earthquakes/a/ringoffire.htm BC Science 7 TextbookPicture: http://www.disaster-survival-resources.com/image-files/pacific-rim-ring-of-fire-map.gif
  • 11. PACIFIC RING OF FIRE MAP
  • 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 A volcano erupting near a cityInfo: http://volcano.oregonstate.edu/how-do-volcanoes-affect-people C Science 7 Textbook BPicture: http://www.neatorama.com/wp-content/uploads/2009/11/cataniaeruption-690255-ga.jpg
  • 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 Science 7 Textbook BCPicture: http://marlimillerphoto.com/images/Ig-25.jpg
  • 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.html http://en.wikipedia.org/wiki/Volcanic_plugPicture: http://cdn9.wn.com/pd/02/bb/858752bb374869472eab0a97abc6_grande.jpg BC Science 7 Textbook
  • 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 Science 7 Textbook BCPicture: http://marlimillerphoto.com/images/Ig-25.jpg
  • 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 http://www.decadevolcano.net/photos/keywords/dikes.hPicture: http://www.decadevolcano.net/photos/santorini/features/santorini_20823.jpg Science 7 tm BC
  • 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.htmPicture:http://www.edinformatics.com/math_science/alternative_energy/geothermal/geoplant1.gif Science 7 BC
  • 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 Geothermal power plant for the environment than others like fossil fuels.Info: http://iceland.ednet.ns.ca/schedule.htmBC Science 7 TextbookPicture: http://www.poweredbymothernature.com/wp-content/uploads/2011/09/geothermal_power_plant.jpg
  • 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 Science 7 BCPicture: http://hkss.cedd.gov.hk/hkss/eng/education/gs/hkg/chapter3/figure2.jpg Textbook
  • 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 http://evolution.berkeley.edu/evosite/lines/IIIAchronology.shtmlhttp://evolution.berkeley.edu/evosite/lines/images/strat_column.gif BC Science 7
  • 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. 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.Info: http://en.wikipedia.org/wiki/Geologic_time_scale Science 7 Textbook BCPicture: http://upload.wikimedia.org/wikipedia/commons/7/79/Geological_time_spiral.png
  • 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.Info: http://en.wikipedia.org/wiki/Geologic_time_scale Science 7 Textbook BCPicture: http://upload.wikimedia.org/wikipedia/en/7/72/Geological_Time_Scale.png