Study the concepts for Earth Science
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| Most volcanoes are located at the edges of continents near... | plate boundaries
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| Where do most volcanoes erupt? | Under the ocean
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| Volcanoes can erupt how? Violently, gently, or both | They can erupt both ways, violently and gently
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| Why might a volcano erupt violently? | A lot of gas or steam has built up or a plug of hardened magma has hardened around a vent
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| Lava's composition can be... | different with different thicknesses and chunks of material within the lava
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| What are some famous volcanic eruptions and what were their effects |
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| Two ways that volcanoes form... | They form over hotspots of magma chambers where pressure builds up under the crust OR they form where in subduction zone where one plate is melting as it goes under the other tectonic plate
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| How are volcanoes a tool for God to sustain the earth? | Volcanoes help to keep the balance of temperature and pressure within the mantle so that not too much pressure or heat builds up which could cause the earth to die or be torn apart.
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| What are the different types of eruptions? | Icelandic, Hawaiian, Stromboli, Vulcanic, Pelean, Plinian
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| What is the icelandic eruption like? | has thin lava and many vents, very gentle
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| What is the hawaiian eruption like? | has thin lava and one vent, very gentle
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| What is the stromboli eruption like? | has thick lava and much gas and steam and ash that is very violent
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| What is the vulcanic eruption like? | bursts of dark ash, steam, and gas. Glowing clouds surrond the eruption
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| What is the pelean eruption like? | composed of fine ash, gas charged fragments of lava, and superheated steam in an incandescent cloud that travels down hill at great speed which destroy everything in its path
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| What is the plinian eruption like? | hot ash clouds, deadly pyroclastic flows, or both, most violent of eruptions, thick lava and gas explode deep within the volcano and the crater collapses
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| What is the difference between magma and lava? | Under surface vs. above surface; large crystals vs. little or no crystals; smooth hardened rock vs. weathered rough rock; very intense heat vs. lower intense heat
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| How can a geologist decide if hardened rock is magma or lava? | The rough weathered rock is lava and the smooth rock is magma
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| How were Devil's tower and Sugar Loaf Mtn. formed? | Lava built up around the volcano and now those mountains are dormant.
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| What are two ways that geophysicists monitor volcanoes and help to predict eruptions? | They use a tiltmeter that measures the angle differencs in the crust and they monitor the temperatures of the streams, lakes, and streams nearby.
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| Where is the Ring of Fire? | the rim around the Pacific ocean where Volcanoes erupt violently
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| Most hotspots are... | in the ocean
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| Volcanic material that hardens in the shape of a tear is... | a pluton
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| Pumice is... | lava that had gas trapped in it as it cooled
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| shield cones are made mostly of... | lava
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| Volcanoes that erupt violently probably have.. | thick magma
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| What are the three different types of volcanoes? | Shield, Cinder cone, and composite
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| What does a shield volcano look like? | gentle slopes and one or more vents with gentle thin lava eruptions
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| Describe a Cinder cone. | steep slope, made of ashes and cinders, with one vent, ash and smoke eruptions
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| Describe a composite volcano. | steep slope, largest volcano, thick lava, pyroclastics, large crater
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Created by:
Mrs. Sutherland