1 / 9

Volcanoes

Volcanoes. By Siobhan Nash. Volcanoes explode because of the gas build-up inside the volcano. When the gas builds up a lot, the gas and lava, which is hot rocks, blows out the top.

mele
Download Presentation

Volcanoes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Volcanoes By Siobhan Nash

  2. Volcanoes explode because of the gas build-up inside the volcano. • When the gas builds up a lot, the gas and lava, which is hot rocks, blows out the top. • Deep inside the earth there is mantle, a solid body of rock.  When rock from the mantle melts the rock moves to the surface through the crust, it releases pent-up gases then the volcano erupts.

  3. Location • Lots of volcanoes happen in the “Ring of Fire” which is from California to Asia in a circle in the pacific ocean. • Volcanoes are found along destructive plate boundaries, constructive plate boundaries and at hot spots in the earth's surface.

  4. Effects • The lava can get up to 1600 degrees which will burn anything, the lava can kill people • Ash and dust can cause breathing problems, and it stays in the air a long time • Volcanoes can give off poisonous gases which could kill you

  5. Famous Volcanoes • Vesuvius (Pompeii) - Italy - It erupted in 79 A.D. It made history's most famous eruption. It destroyed the town's of Herculaneum, Pompeii, and Stabiae. • StHelens - Washington Stromboli - Italy - It's been active since ancient times. It erupts for long times, months even years. • Etna – Sicily - About 20,000 were killed by it's eruption in 1669. • Tambora – Indonesia - In 1815 it's eruption gave 6 million times more power than an Atomic Bomb. It killed about 92,000 people. • - It's violent eruption in 1980 let out a ton of molten rock and hot ash. It killed 57 people.

  6. Mt Vesuvius “Meanwhile on Mount Vesuvius broad sheets of fire and leaping flames blazed at several points, their bright glare emphasized by the darkness of night…On Mount Vesuvius, wide leaping sheets of flame blazed from several places, a brilliant glare against the night’s darkness. There had been earth tremors for several days, but that night they became so strong that everything seemed to be turned upside down… In the other direction a terrifying black cloud was riven by bursts of twisted, flickering fire and elongated tongues of flame… Ashes were already falling, hotter and thicker as the ships drew near, followed by bits of pumice and blackened stones, charred and cracked by the flames . . . Behind, a dense black cloud was threatening. ~ an extract from Pliny the Younger’s letter to Cornelius Tacitus, a Roman senator and historian, describing the eruption of Vesuvius in AD 79. • Some of the dead at Pompeii. Ash covered their bodies and made a mold or negative which archaeologists filled in with plaster many centuries later.

  7. Mt Vesuvius • Mt Vesuvius exploded on August the 24th 79 A.D. • This mountain has erupted more than 50 times since the eruption in 79 A.D., when it buried Pompeii and its sister city, Herculaneum. • Height- 1277 metres • Base - 48 kilometres • Location - Southern Italy near Naples • Age - 17,000 years old • Eruptions - Over 50 (Most Famous in 79 A.D.) • 2000 people were killed • It is the most famous volcano

  8. Bibliography • http://www.scienceclarified.com/Vi-Z/Volcano.html • http://library.thinkquest.org/03oct/01186/causes.htm • http://library.thinkquest.org/C0112681/Eng/Normal/Kids/cause.htm • http://www.geography.learnontheinternet.co.uk/topics/whatvolcano.html#loc • http://sd71.bc.ca/sd71/school/courtmid/_2005_student_web/7_4/2_s_sara-jane/index.htm • http://upload.wikimedia.org/wikipedia/commons/b/b0/Map_plate_tectonics_world.gif • http://www.worldatlas.com/aatlas/infopage/ringfire.htm • http://library.thinkquest.org/03oct/01754/index.html

More Related