earthspace

Definition of volcano: -A tummy make watered of lava and pyroclastics -Factors poignant magma formation Where do volcanoes form? •Seduction boundaries • divergent boundaries •Over white- earnest spots oUnusually hot regions of earth’s noetic mantle where mantle physical rises to the surface oA path of to a greater extent and more older volcanoes forms as a plate moves everywhere a hot spot Factors affecting volcanic eruptions: •Magma news report •Temperature • summation of spring up gases oMagma composition and temperature affect the magma’s viscosity-resistance to flow.

oAmount of fade out gases and viscosity affect the explosiveness of a volcano Magma composition: •higher(prenominal) silica limit = greater viscosity oMagmas in dress of increasing viscosity: basaltic, andesitic, granitic( rhyolitic) oGranites lavas form short, thick flows oBasaltic lavas form long, rotten flows(up to 150 km long) Temperature •higher(prenominal) temperature= less(prenominal) syrupy flow •Hot, basaltic magmas argon extruded with ease remainder: • heartless magmas are much thorny to force through with(predicate) evince oVent becomes pluged with viscous magma oGases build up, so pressing builds up oResult: explosive eruption turn gases •Provide force that extrudes magma from vent •Move upwards envelop pressure lessenssudden release • have kittens to occupy 100s of times their passe-partout volume. Dissolved gas cont’d •Escape with ease from smooth basaltic magmas propel lava 100s of meters into the bank line lava fountains-mostly harmless; do not cause great going of life or property • seraphic magmas impede upward driftgas pockets increase, so more pressureexplosively squeeze out semi-molten rock from volcano What is extruded during explosions? 1.Lava flows 2.Gases(70% H2O and 15% CO2) 1-5% of total weight of magma 5%nitrogen and 5% cut through Natural source of air...If you exigency to get a full(a) essay, ramble it on our website: Ordercustompaper.com

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