2. 01 Describe the volcano and its parts;
02
Recognize the significance of
understanding volcanoes by creating an
essay; and
03 Illustrate the formation of volcanoes
through a diagram.
OBJECTIVES
4. Do you recognize these volcanoes?
In what particular places in the Philippines can we find and see
these volcanoes?
What are the similarities between these volcanoes?
What are the differences between these volcanoes?
11. ASH, STEAM, AND GASES
Ash, Steam, and Gases can
be seen as clouds or smoke
which is pushed out of the
volcano.
12.
13. CRATER
Crater is a circular depression at
the top of a volcano, wherein this
is usually the main vent or
passage of magma and other
materials coming out from the
volcano.
14.
15. MAIN VENT
Main Vent is the main tube
that connects the magma
chamber to the surface.
16.
17. LAVA
Lava is a molten rock after it
reaches the surface,
previously it is known as
magma since it is still inside
of the volcano.
18.
19. SECONDARY CONE
Secondary Cone is a cone
that builds up secondary
vents. It is a second outlet
from which lava and gases
will pummel the Earth's
surface
35. Classifications Of Volcano
An Inactive Volcano is also
known as Dormant volcanoes,
these are volcanoes that have
not erupted in a long time but
are expected to erupt again in
the future.
INACTIVE
42. TYPES OF VOLCANO
Composite volcanoes, also
called stratovolcanoes, are
cone-shaped volcanoes built
from many layers of lava,
pumice, ash, and tephra.
45. TYPES OF VOLCANO
Shield volcanoes are very
large, broad, shield-like
structures that have a low
aspect ratio (i.e., much wider
than they are tall).
48. TYPES OF VOLCANO
Cinder cones, also known as scoria
cones, are the smallest and simplest
type of volcano. They are the world's
most common volcanic landform. As the
name "cinder cone" suggests, they are
cone-shaped hills made up of ejected
igneous rocks known as "cinders".
50. VOLCANO
a vent that directly connects magma to the surface of the Earth.
CLASSIFICATION
PARTS TYPES
Volcanic Bombs
Crater
Ash, Steam, Gases
Main Vent
Lava
Secondary Cone
Secondary Vent
Magma Chamber
Magma
Extinct
Inactive/Dormant
Active
Cinder Cone Volcano
Shield Volcano
Stratovolcano
52. TYPES OF VOLCANIC ERUPTION
Phreatic is a stream-driven
eruption as the hot rocks come
in contact with water. It is short
lived, characterized by ash
columns but may be a beginning
of a larger eruption.
56. TYPES OF VOLCANIC ERUPTION
Strombolian is a periodic weak
to violent eruption characterized
by fountain lava, the explosions
usually occur every few minutes
at regular or irregular intervals.
58. TYPES OF VOLCANIC ERUPTION
Vulcanian eruptions are
moderately explosive but
intermittent, producing moderate
ash columns. These eruptions
are more explosive than
Strombolian, and sometimes
destroy part of the volcanic
edifice.
60. TYPES OF VOLCANIC ERUPTION
Plinian eruptions are extremely
explosive eruptions, producing
ash columns that extend many
tens of miles into the
stratosphere and that spread out
into an umbrella shape.
