Types of Volcanoes

Presentation

•

Science

•

8th Grade

•

Practice Problem

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Easy

Anthony Edmondson

Used 35+ times

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8 Slides • 7 Questions

Types of Volcanoes

What make a volcanoes Violent?

Factors that determine an eruption

Amount of water vapor
How much silica

Types of magma

High silica
low silica

Quiet eruptions

Low silica magma
Basaltic magma-more fluid
less trapped gasses

Explosive Magma

Silica rich
Granitic magma
This magma is thicker causing it to stick and build pressure beneath it

Shield Valcano

Spread out in flat layers
E.G. Hawaii

Cinder Cone Volcano

explosive eruption throw little pieces of lava and rock in the air called Tephra
This forms tall steep volcano that is loosely packed

Composite Volcanoes

alternating layers of tephra and slow-flowing magma
between eruption that are quiet and explosive

Multiple Choice

What kind of magma is runny and flows quietly down a hill.

Basaltic

Granitic

Multiple Choice

What kind of magma causes violent eruptions?

Basaltic

Granitic

Multiple Choice

What are the two factors that influence an eruption

water vapor and silica

CO2 and silica

CO2 and water vapor

Multiple Choice

What type of magma is thick and causes gasses to build up in a valcano?

Basaltic

Granitic

Multiple Choice

A flat dome shaped valcano that is made of layers of runny lava.

Shield valcano

composite volcano

Cinder cone volcano

Multiple Choice

A volcano made of loosly packed tephra.

shield volcano

composite volcano

cinder cone volcano

Multiple Choice

Volcano made of layers of alternating tephra and runny lava.

shield volcano

composite volcano

cinder cone

Types of Volcanoes

What make a volcanoes Violent?

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