Hawaii Z z Z

Measuring the temperature Heat suit USGS photo by R.L. Christiansen Jan.9, 1973

vent cone magma chamber conduit

A look inside the Earth Mantle Outer Core Inner Core Crust

A look at the mantle and crust

Cold Crust Ocean Hot Melt Hot Mantle Cooler Mantle

magma

Hawaii

Courtesy of

Rough Lots of pieces Smooth or Ropy Courtesy of A. Rust

World map of volcanoes erupted within the past 10,000 years Courtesy of Smithsonian Institution Global Volcanism Program

USGS/Hawaiian Volcano Observatory Photo by J.D. Griggs

Danger to People, Places and Things

Fast flowing rocks! Bent bars of a broken house. Which way did the flow go?

USGS/Cascades Volcano Observatory Photo by David Wieprecht

Courtesy of Swisseduc.ch

Examples from Past and Present Courtesy of

Vesuvius, Italy – 79AD Explosive Ash and flows covered Pompeii

Excavations cc. Crew Creative cc. of Crew Creative

Plaster casts of bodies

Vesuvius today Naples

Mt. Pelée, Martinique

Photo by Angelo Heilprin

Vestmannaeyjer, Iceland

Lava flows caught people by surprise

Spraying seawater to slow or stop lava flows

What can we do to help people who live near active volcanoes? Mt. St. Helens

Volcano Observatories on Active Volcanoes

Ground bulging or popping up magma tiltmeter

Earthquakes

Gas or Bubbles

What is a volcano? Mountains that erupt. A dormant volcano is:awake asleep ________ chamber V____ Conduit Cone What is lava and magma? m + bubbles + crystals Why do volcanoes erupt? Hot magma wants to go: up down How do volcanoes erupt? Two types: e and effusive. Explosive volcanoes erupt a lot of into the air. What helps make explosive volcanoes erupt?. Can you outrun a pyroclastic flow? Can lava burn trees and houses? Do effusive volcanoes have runny or sticky lava?. l a v a e l t x p l o s i v e b u b b l e s a s h r u n n y yes no e n t M a g m a

3km N

Real-Life Scenario Courtesy of