Download Volcano Notes Student

VOLCANOES
What is a
volcano?
Volcanoes
erupt many
types of
materials:
Is magma
and lave the
same thing?
What is a
magma
chamber?
A volcano is an ____________ in the Earth’s crust through which
__________, ______________, and hot gases ___________.
• __________
• Rock Fragments
• ___________ ___________ (Mixture of Water Vapor ,
Carbon Dioxide, and ashes)
• ______________ ________ – Mixture of gases and rock
fragments that form a dense cloud.
Magma is molten rock __________the Earth’s __________. When
magma erupts, it is called ___________.
Lava is molten rock, or magma that __________ the Earth’s
____________ through a ___________.
Magma collects in areas called “________ _________.” Volcanic
eruptions occur when a _________ is not large enough to
__________ additional magma that pushes in. Magma can remain in
a chamber until it __________, forming __________ rock, or it
Rock
fragments
include:
Volcanic
Gases
Pyroclastic
Flow
can erupt in the form of ___________.
 Volcanic Ash
 Volcanic Cinders
 Volcanic blocks/bombs
Volcanic gases look like smoke rising from the volcano. They are a
mixture of ash and gases namely, carbon dioxide. Some volcanic
gases combine with water in the air to form acids.
Sometimes volcanic gases can mix with ________ __________
forming a ___________ ________. This is a dense cloud of
superhot gases and rock fragments that races downhill. It can be as
hot as 800°C (1500°F) and can travel faster than
________kilometers per hour (100 mi/h). Pyroclastic flows are the
most _____________type of volcanic eruption.
VOLCANOES
Formation
of Volcanoes
•
•
Volcanoes are _________ along tectonic plate boundaries
where oceanic plates ________ beneath other plates.
Volcanoes are also common along tectonic boundaries where
plates ________ ________, allowing magma to rise from
Types of
Volcanoes
the ___________.
• Occasionally, volcanoes are formed over a hot spot far from a
plate boundary.
Shield Volcano - A shield volcano is built from many ________ of
lava that is low in silica and flows easily. It is a broad ______ dome.
Cinder Cone Volcano - A cinder cone is a _______, _______-shaped
hill. It is built of pieces of _________ that harden in the air and
fall to form a small, steep-sided volcano.
Composite Volcano - A composite volcano is a _______-shaped
volcano built of _______-________ magma. The tall cone consists
What are
immediate
effects of
volcanoes?
of layers of _______ and layers of ________ fragments.
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What are
long term
effects of
volcanoes?
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VOLCANOES