hawaii z z z measuring the temperature heat suit usgs photo by r.l. christiansen jan.9, 1973

Hawaii

Z zZ

• 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

InnerCore

Crust

• A look at the mantle and crust

Cold Crust

Ocean

Hot Melt

Hot Mantle

CoolerMantle

magma magma

Hawaii

Courtesy of www.swisseduc.ch

RoughLots of pieces

Smooth or Ropy

Courtesy of A. Rust

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 ObservatoryPhoto 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 ObservatoryPhoto by David Wieprecht

Courtesy of Swisseduc.ch

Examples from Past and Present

Courtesy of www.swisseduc.ch

• 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 - 1902

Photo by Angelo Heilprin

• Vestmannaeyjer,Iceland - 1973

• 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

magma

tiltmeter

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

3kmN

• Real-Life Scenario

Courtesy of www.swisseduc.ch