Volcanoes and society. Location Usually at plate boundaries At hot spots The ring of fire is the coastal regions around the pacific ocean where plates.

Slides:

Advertisements

Similar presentations

What caused Mt. St. Helen’s to erupt?

Advertisements

Composite Volcanoes Review: What characteristics make a composite volcano? Answer: High Gas, High Silica, High Viscosity.

Nature’s Disasters: Volcanoes and Earthquakes. Volcanoes A volcano is an opening in a planet's crust, which allows hot magma, ash, rock and gases to.

Mr. Altorfer Volcanoes Pages 306 to 315.

Volcanic Hazards Landslides Ash fall Pyroclastic flow Lahar Lava flow.

By: Danny Isaac.  The Name of my volcano is mount Cleveland.

1 Volcanoes. 2 Different Volcanic Settings 3 Types of Eruptions Eruptions will generally be of two types: Quiet (Rift) eruptions Explosive (Subduction)

Volcanoes and volcanism. Goals To examine the relationship between magma composition, the kinds of volcanoes and volcanic processes that occur, and plate-tectonic.

Volcanoes are Hot Stuff Volcanoes I. Volcano: An opening in the earth's crust through which magma flows out as lava Magma that comes to surface orignates.

Volcanoes: Nature’s Awesome Power by Maryann Dobeck

Physical & Chemical Properties of Molten Rock

How do volcanoes form and what affect do they have on the Earth?

Wednesday February 24, 2010 Volcanic Activity. Basic Information  All volcanoes are fueled by magma deep beneath Earth’s surface  Magma = Mixture of.

VOLCANOES. Volcano Basics Active – a volcano that has erupted recently (geologically speaking) Dormant – (sleeping) has erupted within the past few thousand.

VOLCANOES. A few volcano basics… Active – a volcano that has erupted recently (geologically speaking) Dormant – (sleeping) has erupted within the past.

Volcanoes Geology 12 Citadel High School. What comes out of a volcano? Gas Most common: H 2 O - water CO 2 – Carbon Dioxide SO 2 – Sulfur Dioxide HCl.

VOLCANOES 21.2 What is a volcano? Volcano: opening in the Earth’s crust where magma erupts onto the surface Magma: molten rock underground Lava: magma.

Plate Tectonics. Crust The crust is formed from continental and oceanic crust The crust covers the whole Earth.

Volcanic activity sites along boundaries Where do volcanoes occur—and why? Divergent [MOR] boundaries – About 75% of erupted lava is found here – Basaltic.

Volcanism and Extrusive Rocks. Volcanism and Earth’s Systems Atmosphere originally created from gases released by magmas Hydrosphere produced by condensation.

MAGMA is molten rock, but is not just liquid - also contains bits of rock crystals and gas. It ranges in consistency from wet concrete to thick oatmeal.

1 Volcanoes Volcano Cam. 2 Different Volcanic Settings.

Volcanoes. l Evidence that we live in an active planet l The gods of the underworld l Millions of people live near active volcanoes –The greatest geological.

Volcanoes Chapter 15 Section 2.

Volcanoes March Eruption Types 1. Explosive ejects gases, ash, and pyroclastics shot into air and across ground caused by lots of water and gases.

VOLCANOES. Formation of Magma Even though the mantle is so hot it’s still mostly solid. Even though the mantle is so hot it’s still mostly solid. Why?Why?

Volcano WebQuest Follow-Up. A volcano is: An opening in the earth’s crust that allows magma, pyroclasts, and gases to escape.

Volcano Notes Chapter 18.

Chapter 6 – VOLCANOES. Volcanoes & volcanic hazards Volcano –Vent where lava, solid rock debris, volcanic ash, & gases erupt from inside Earth onto its.

Volcanoes Chapter 6.

 More than 600 active volcanoes on Earth  Kilauea in Hawaii erupts continuously.  Iceland is a country that is made entirely from volcanoes.

Draw a cross section of the earth and label it with the correct names and characteristics crust - relatively thin and rocky (Oceanic 30-50km and continental.

V OLCANOES By : Charlotte Adams :]. W HAT IS A VOLCANO ? A volcano is mountain with an opening, or rupture, in a planet's surface or crust, which allows.

Magma is a mixture of melted rock and hot gasses..

Map of Volcanoes around the WORLD!. Volcano Discovery ea ea This site.

EARTH SCIENCE Mrs. Baker cjcb2015

Chapter 12 Volcanoes. An opening in the Earth that erupts gases, ash, and lava Volcanic mountains form when layers of lava, ash, and other materials build.

Chapter 18 Volcanism and Plate Tectonics. There are about 485 active volcanoes world wide. Volcano is a term applied to a structure built around a vent.

VOLCANOES CHAPTER 10. Viscosity – the resistance to the flow. As temperature decreases, viscosity increases. As silica content increases, viscosity increases.

Chapter 12 Section 4 - Volcanoes.  Movement along a fault causes a decrease in pressure – decompression  A decrease in pressure causes a decrease in.

Volcanic Hazards. LAVA Lava often poses the least risk in an eruption Lava often poses the least risk in an eruption It is partly the thickness of the.

Volcanoes in our Community Volcanic Hazards: Airborne Problems Science Std: Geo # 3f.

Plate Tectonics and Mountain Building.  Three most common types of mountains:  Fault-block mountains  Folded mountains  Volcanic mountains.

Warm Up # 13 What is being shown in the picture on the left? What is being shown in the picture on the right? How do they relate to each other?

Volcanoes Chapter 6. What are volcanoes? They are openings in the Earth that erupt gases, ash, and lava.

Chapter 7 Volcano Volcano- vent in the Earth’s surface that often forms a mountain when layers of lava & volcanic ash erupt & build up.

HOW DO VOLCANOES CAUSE DEATH & DESTRUCTION? Earth Science.

Chapter 9 Volcanoes.

Volcanoes: The Fire Within Chapter 9: Volcanoes. What is a Volcano? A vent that lets out heat from inside the Earth, spewing out lava and eventually forming.

Volcanoes. What are Volcanoes? ●Volcanoes are vents in the Earth’s crust through which melted rock flows onto Earth’s surface. ●Magma is molten, or melted,

Volcanoes. Volcano Stats Definition of Volcano –Mountain that forms when molten rock (magma) is forced to the Earth’s surface Number of active volcanos.

Volcanoes Chapter 6.

VOLCANIC ACTIVITY Unit 2 - Ch 10.

Chapter 10-Volcanoes and Other Igneous Activity

Ch. 18 Notes Day 1 10/13/16.

An opening in the earth’s crust through which magma erupts.

Volcanology: The Study of Volcanoes

Volcanoes Chapter 9 section 2.

Volcanoes Talk about this volcano when it erupted and what it is doing right now.

Volcanoes Earth Science Chapter 10.

An opening in the earth’s crust through which magma erupts.

Presentation transcript:

Volcanoes and society

Location Usually at plate boundaries At hot spots The ring of fire is the coastal regions around the pacific ocean where plates are moving, creating volcanoes.

Risks Ash and tephra Rocks Sun is blocked out. Climatic changes Pyroclastic flows Lahars Earthquakes Lava

Volcanic ash and gasses SO 2 Sulfur dioxide, is a deadly gas. CO 2 Carbon dioxide. Water vapor (HOT). Tiny molten silica (glass). Ash consists of tiny jagged pieces of rock and glass. Ash is hard, abrasive, mildly corrosive, conducts electricity when wet, and does not dissolve in water. Ash is spread over broad areas by wind.

Bombs and other debris LARGE objects usually really hot thrown from volcano.

Flows and Lahars Pyroclastic flows are fast-moving current (450mph) of superheated (1400 o F) Lahars are mudslides created when ice is melted from the eruption and flows down the slope.

Earthquakes Before an eruption earthquakes increase in size and numbers.

Climate changes The ash and debris from the eruption is shot into the upper atmosphere (50 miles!) and the winds carry that ash around the world. Lowers temperatures (blocks out the sun), and creates storm systems.

Prevention No real accurate prevention. When the pressure builds it will release it somehow.

Predictions Can we predict, Yes. It is like predicting the weather! Scientists use earthquake swarms to predict a possibility of an eruption. The lava dome inside the volcano is observed, if it builds then pressure is increasing.

Protection Knowledge! The land around the volcano is very fertile, but unpredictable. Know routes out of the area. Have a plan. Have a supply kits in the home. If it happens and your in the way most likely there isn't much you can do.

Major past events 1980 Mt. St Helens (Washington,USA) 2010 Eyjafjallajökull (Iceland) 1991 Mt. Pinatubo (Philippines) 1982 El Chicho (Mexico) 1883 Krakatoa (Indonesia) 1815 Tambora (Indonesia) 1630 BC Santorini (Greece) 79 AD Vesuvius (Italy)