Most volcanoes form where the plates of the earth come together. A volcano is a vent in the earths crust through which lava, steam, ashes etc. If a volcano does not produce lava, it is not dangerous. Perhaps the best known of all volcanic landforms are the volcanoes themselves. This is the fiercest eruption of all because the gases and magma become trapped inside the volcano. Powerpoint is the worlds most popular presentation software which can let you create professional a volcano powerpoint presentation easily and in no time. While viewing this powerpoint they will compare explosive and flowing eruptions, learning what causes each. While utah does not have any active volcanoes, several basalt flows in the west desert area are only several hundred years old. Some volcanoes may exhibit only one characteristic type of eruption during an interval of activityothers may display an entire sequence of types.
This is a 45 slide powerpoint which describes and illustrates three types of volcanoes and the kind of eruption that causes each type. On subduction zones on constructive plate boundaries on hot spots 4. Chapter 10 volcanoes and other igneous activity section 10. Included are the shield volcano created by an icelandic or hawaiian eruption, a cinder cone volcano formed by a strombolian eruption, and the composite or stratovolcano formed by a vulcanian, a pelean, or a plinian eruption. Eruption patterns there are three different levels of eruption. Lava types produced at the constructive plate boundary by the upward movement of magma from the mantle. A vulcanian eruption is a short, violent, relatively small explosion of viscous magma usually andesite, dacite, or rhyolite.
They discover that there are two types of magma, and three forms or volcanoes. Effusive eruptions explosive eruptions volcano forecasting and planning volcanic settings shield and composite volcanoes effusive eruptions generally at hots spots, spreading centers mantly comes directly to surface hot lava. The lessons, and their descriptions, are found in powerpoint files with the following titles and in the order they are taught lesson 1. This powerpoint on volcanoes can be used for any late elementary if modified, middle, or early high school science classgrade. Informative text on volcano types and shapes, vocabulary terms to know, how and what is an eruption, how eruptions are measured, the difference between lava and magma, fun facts, famous volcanoes, types of igneous r. Types of volcanoes 1 volcanoes 2 types of volcanoes. Types of plate boundaries and movement to understand more about volcanic formation, read pages 33 to 35 of the unit 1 textbook task. Powerpoint is the worlds most popular presentation software which can let you create professional earthquakes and volcanoes powerpoint presentation easily and in no time. Types of volcano volcanoes can be active, dormant or extinct.
The final lesson has no presentation and is a synthesis of the entire unit. Creative volcano presentation free powerpoint template. You may stop the video at any time by pressing the esc key. This type of eruption results from the fragmentation and explosion of a plug of lava in a volcanic conduit, or from the rupture of a lava dome viscous lava that piles up over a vent. Predicting volcanic eruptions volcanic eruptions 2 types of lava chemically, effects eruptions intensity 1. Some of these volcanoes emerge from the water because they are very high. This type of volcano has the most powerful eruptions of all. Hawaiian volcanoes are in the middle of the pacific plate. Shield volcano volcanoes with broad, gentle slopes and built by the eruption of fluid basalt lava the largest volcanoes on earth are shield volcanoes basalt lava tends to build enormous, lowangle cones because it flows across the ground easily and can form lava tubes that enable lava to flow tens of kilometers from an erupting vent with. Volcanoes only erupt straight up through the top vent.
The first one is a fourstage snake diagram that could be useful to showcase the steps of an eruption, for example. For these reasons, the impacts of at least some types of volcanic eruptions should be easier to mitigate than other natural hazards. Types of volcanoes and eruptions powerpoint volcano. This helps you give your presentation on a volcano in a conference, a school lecture, a business proposal, in a webinar and business and professional representations. Amsti volcanoes volcano intro can usually be predicted clues. In a stromboliantype eruption observed during the 1965 activity of irazu volcano in costa rica, huge clots of molten lava burst from the summit. Composite volcanoes, also called strato volcanoes, are formed by alternating layers of lava and rock fragments. Content introduction process of volcanic eruption types of volcanic eruption reasons of volcanic eruption effects of volcanic eruption top 10 deadliest volcanic eruption safety tips 3. This is a fast motion screen capture of an earth science teaching resource. Eruptions can be effusive, where lava flows like a thick, sticky liquid, or explosive, where fragmented lava explodes out of a vent. Multiple types of eruptions can occur at each of new zealands volcanoes the eruption type can vary minute to minute. The different types of volcanic activity can best be understood by making comparisons, and in this section two specific eruptions are comparedthe 1991 eruption of mount pinatubo a classic example of explosive volcanism and the 1984 eruption of mauna loa illustrative of effusive volcanism.
This video helps you understand what causes volcanoes to form. The style of eruption depends on a number of factors, including the magma chemistry and content, temperature, viscosity how runny the magma is, volume and how much water and gas is in it, the presence of groundwater, and the plumbing of the volcano. A point on the earths crust where magma forces its way to the surface ash and gases may also escape 3. Types of volcanic eruptions nonexplosive types of volcanic eruptions explosive the types of magma is important water and magma the types of magma is important silica and magma 2 slides what erupts from a volcano. Strombolian, vulcanian, pelean, icelandic, hawaiian, plinian. This volcano unit is exploding with a variety of printables, diagrams, interactive notebooks, and a 100% editable powerpoint. Shield volcanoes cinder cone volcanoes composite volcanoes dome volcanoes mauna loa kilauea some volcanoes in guatemala lassen peak mount shasta mount hood 15 time to read. Free powerpoint presentations about volcanoes for kids. Emission rates of so 2 from an active volcano range from 10 million tonnesday according to the style of volcanic activity and type and volume of magma involved. Volcano refer to the eruption of hot molten lava from below the surface of earth. Volcanoes powerpoint geology unit by science spot tpt. Volcanoes eruptions and forms of volcanoes presentation. A volcano is a mountain that opens downward into a pool of magma, magma chamber when pressure builds, eruptions occur.
Each eruption builds a new single new volcano, which does not erupt again. For each type of plate boundary, record the following in your exercise book. Volcanoes are mountains with openings in earths crust through which magma, gases, and ash reach the earths surface. This helps you give your presentation on volcanoes of hawaii ppt in a conference, a school lecture, a business proposal, in a webinar and business and professional representations the uploader spent hisher valuable time to. Cinder cones shield volcanoes composite volcanoes global effects of volcano eruptions can change earth s climate for several years. Visual concept chapter 9 different types of volcanoes volcanic eruptions can cause profound changes in climate, but the changes to the earths surface are more familiar. Use the powerpoint below to learn about the different types of plate boundaries that volcanoes can form along. Mount eden and rangitoto island are examples in auckland. In a strombolian type eruption observed during the 1965 activity of irazu volcano in costa rica, huge clots of molten lava burst from the summit crater to form luminous arcs through the sky. The last eruptive metatype is the phreatic eruption, which is driven by the superheating of steam via contact with magma. Steep slopes close to 40 degrees not more than a few hundred meters high.
Volcanoes are frequently classified by their size and shape as is described in the section volcanic landforms, but. Volcanic eruption a volcano is a mountain where lava hot, liquid rock comes from a magma chamber under the ground. This order of eventseruption, formation of cone and crater, lava flowis a common sequence. Ppt volcanoes powerpoint presentation free to download. This helps you give your presentation on earthquakes and volcanoes in a conference, a school lecture, a business proposal, in a webinar and business and professional representations. Water vapor steam is the most common gas emitted by a volcano 7090%. Composite volcanoes, also called stratovolcanoes, form tall conical mountains. There are 28 slides excluding the title slide on this powerpoint which contain the following titles. However, even the ones that do erupt typically have a lower impact than stratovolcanoes. It is designed as a motivational trailer to be shown in classrooms by earth science and. When magma melted rock erupts from the volcano the top of the mountain can be changed, either built up or exploded off. Elementary geologists are fascinated with volcanoes.
This hd dramatic video choreographed to powerful music introduces the viewerstudent to volcanoes. This is a beautifully designed app thats full of information, activities and gamesencyclopedia britannica kids volcanoes provides wonderful content in a friendly and educational presentation. Students will enjoy learning about volcanoes with this 29 slide animated powerpoint. Powerpoint is the worlds most popular presentation software which can let you create professional volcanoes of hawaii ppt powerpoint presentation easily and in no time. Powerpoint ppt presentation free to view three types of volcanoes three types of volcanoes shield volcanoes low silica level low viscosity lava high or low levels of gas flattened mound resembles a warrior s shield mauna loa. If a volcano doesnt erupt for a hundred years, its extinct. The most common type of volcanic eruption occurs when magma the term for lava when it is below the earths surface is released from a volcanic vent.
The purpose of this powerpoint is to summarize key facts and information about the different types of volcanoes and lava. Ppt types of volcanoes powerpoint presentation free to. Shield volcanoes are some of the most inactive types of volcano in the world. Composite volcanoes a composite volcano switches between quiet eruptions of flowing lava and violent eruptions of thick, gasrich lava pyroclastic material. Volcano six types of eruptions britannica encyclopedia britannica. Types of volcanoes and eruptions powerpoint by annette. In addition, eruptions of volcanoes in the western united states, including the yellowstone caldera, could result in volcanic ash clouds and significant deposition in utah. The students should conclude that volcanoes produce different types of rocks. A shield volcano is a type of volcano usually built.
Hawaiian, strombolian, vulcanian, surtseyan, lava domes, effusive and explosive. Effects of volcanoes there are many different types of volcanic eruptions and associated activity. The creative volcano powerpoint template comes with two sequential infographics. Other characteristics associated with composite and shield volcanoesboth volcano types commonly contain abundant gases dissolved inthe magma especially compositetype. For example, the large explosive eruption of mount pinatubo on 15 june 1991 expelled 35 km 3 of dacite magma and injected about 20 million metric tons of so 2 into.
805 545 645 1371 1129 989 1375 1023 1670 1313 123 10 1648 1009 827 573 778 1028 437 490 1649 1093 1550 822 527 1530 949 1300 197 409 425 842 289 989 75 302 1617 473 1231 665 269 1043 900 716 1063 490