Volcanoes+3

Standard: 1. Plate tectonics accounts for important features of Earth’s surface and major geologic events. As a basis for understanding this concept: a. Students know evidence of plate tectonics is derived from the fit of the continents; the location of earthquakes, volcanoes, and midocean ridges; and the distribution of fossils, rock types, and ancient climatic zones. d. Students know that earthquakes are sudden motions along breaks in the crust called faults and that volcanoes and fissures are locations where magma reaches the surface. e. Students know major geologic events, such as earthquakes, volcanic eruptions, and mountain building, result from plate motions. f. Students know how to explain major features of California geology (including mountains, faults, volcanoes) in terms of plate tectonics. g. Students know how to determine the epicenter of an earthquake and know that the effects of an earthquake on any region vary, depending on the size of the earthquake, the distance of the region from the epicenter, the local geology, and the type of construction in the regione =volcanoes=
 * Plate Tectonics and Earth’s Structure**

====I**NTRODUCTION** :In this article im going to talk about volcanoes.Im going to tell you about how volcanoes are made.Volcanoes are montains formed by magma that escaped from earths interior,then coded.In a volcanoe they have a crater,lava,central vent,hot gasses,ash,side vent, and magma. volcanoes are very dangerous they have melted fire then volcano all of the lava comes out burning everithing in his way.ch erupcion adds a new layer alog the slope.If you look at a map you will notice that volcanoes seen cluster in some areas.A composite volcanoes is composed of alternating layers of lava and ash.Inside an erupting volcanic a volcano may erup though one or more side vents as its central vent.The mountain forms from layers of lava,ash and other debris.==== ====**TYPE OF VOLCANOES**: Cinder cone volcano is a volcano with slopes made mostly of rock and ash.A Composite volcano is composed of alternating layers of lava and ash.Sheild volcano has a gentle slope and is made almost entirely of layer upon layer of lava .==== ====**EFECT OF VOLCANO ERUPTIONS**: Like earthquakes volcanic eruptions can quickly change earths surface.Volcanic eruptions do have some helpful results.Weathered lava produses very furtal soil near volcanoes.But most offten,volcanoes are hazards for people ho live near them.Volcanic eruptions can set fires to forestes,expel hot and poisones gases,kill wild life and bury their habitads.Even destrois the whole cities.====


 * CONCLUSION**:in conclusion i think the volcanoes are very dangerous because when hot lava comes out it destroys everything in his way like cities and forests they even grow under water.They have hot spots,hot spots are is an area of interior of a plate where a rising,plume of hot magma escapes earths crusts.


 * BY:ricky&fernando**