Download Volcanoes by Marida Torosyan and Ani Tashyan

Volcanoes by Marida Torosyan and Ani Tashyan
Volcanoes and Plate
Boundaries
There are 600 active volcanoes
on land.
 One important volcanic belt is
the Ring of Fire.
 Plates are immense pieces of
crust that cause volcanic
eruptions.
 Volcanoes are made on plate
boundaries that also cause
volcanic eruptions.

How Volcanoes Form
Volcanoes
usually form on
mid ocean ridges.
 Along the rift
valley lava pours
out of cracks.
 Volcanoes form
on spreading
boundaries on
land.

Shield Volcanoes
Usually volcanoes are
created on Hawaiian
islands and the Medicine
Lake.
 Volcanic layers of lava
pour out of a vent and
harden on top of
pervious layers.

Cinder Cone Volcanoes
Example: Ash,
cinders, and bombs
combine together and
form cinder cones.
 One cinder volcano in
Paricutin erupted in
1943.

Composite Volcanoes



Composite
volcanoes are
tall and
alternate with
layers.
An example of a
composite
volcano is
Mount Fuji in
Japan.
Composite
volcanoes flow
with explosives
such as ash,
cinders and
bombs.
Volcano Vocab.
Volcano: A weak hot spot
were molten material
(magma) comes to the
surface.
 Magma: The molten
mixture made out of
different types of gases
and water.
 Lava: The magma that
comes out of a volcano
and hardens.

Hot Spots
Hot Spot: An area
were materials
from deep in the
mantle rise and
melt
 Every time that
volcanoes form
they form on top
of hot spots.

Kinds of Eruptions
There are quiet
eruptions that
don’t really
explode.
 But many
volcanoes can be
very explosive
and destructive
hazards.

The End