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Volcanoes
By Chelsea Alston & Tyrell Edmondson
V olcano Lava
Pyroclastic
Material
Types of Volcanoes
•
Shield VolcanoCinder Cone Volcano
Composite Volcano
Craters are funnel – shaped pits that form
around the central vent of a volcano
Calderas form when a magma chamber that supplies material to a volcano empties and its roof collapses
How Volcanoes Erupt
• Volcanoes result from magma formed in the Mantle .
A Magma Chamber Is is a large underground pool of molten rock found beneath the surface of the Earth.
Volcano Ashes
• Exposure to ash can be harmful. • Infants, elderly people, and people with Bad
conditions like asthma • Ash is gritty, and always unpleasant.• Small ash particles can abrade (scratch) the
front of the eye.
Volcanic Gases
• Most gases from a volcano quickly blow away.• heavy gases such as carbon dioxide and
hydrogen sulfide can collect in low-lying areas.• Other volcanic gases include hydrogen
chloride, carbon monoxide, and hydrogen fluoride.
.
Volcanic Gases (#2)
• Amounts of these gases vary widely from one volcanic eruption to the next.
• People who are close to the volcano or who are in the low-lying areas downwind may be exposed to levels that may affect health.
Summary
• Volcano• Lava• Pyroclastic Material• Shield Volcano• Cinder Cone Volcano• Composite Volcano• Crater• Caldera• Rift • Hot Spot