Volcanoes!

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Volcanoes!

• Earth Science
• Inside Earth
• Mr. Willems

Picture
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Plate Tectonics
diverging plate boundaries.

• Volcanoes form along plate boundaries.

http//www.geo.lsa.umich.edu/crlb/COURSES/117/Lec
19/div.jpeg
converging plate boundaries.
http//www2.nature.nps.gov/geology/usgsnps/pltec/c
ontvsocn288x157.gif
and hotspots.
http//www.geologyrocks.co.uk/geopics/ptmap.gif
Volcanoes form along three different types of
boundaries. They are
http//www.tulane.edu/sanelson/images/hotspot.gif
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Magma

• Properties

Viscositygreater the viscosity, the slower it
flows.

• Physical, difference
• Density
• Melting point
• Hardness
• Magnetic

Low viscosity water
High viscosity molasses

• Chemical, difference
• Ability to burn
• React
• Combine

http//www.ci.fort-collins.co.us/water/water-image
s/water-hands.jpg
http//www.svgintermol.com/images/molasses_drip_lg
e.gif
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Volcanic Eruptions
Quiet eruptions are low in silica.
http//www.geokem.com/images/pix/mauna-loa-lava-fl
ow.JPG
Explosive eruptions are high in silica.
http//www.enchantedlearning.com/subjects/volcano/
gifs/volcanodiagram.GIF
http//www.aad.gov.au/asset/images/383_ul-volcano_
eruption.jpg
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Volcano Landforms
Shield volcano
Lava plateau
http//www001.upp.so-net.ne.jp/fl-fg/01-02_lava_pl
ateau-yasima.jpg
http//www.willamette.edu/mrother/shield20volcan
o.jpg
Cinder cone volcano
Composite volcano
Caldera
http//www.windows.ucar.edu/earth/images/composite
_volcano_3_small.gif
http//science.tjc.edu/Course/BIOLOGY/Colorado/cap
ulin.jpg
http//www.alanpalmer.org.uk/images/caldera.jpg