SCIENCE 9- 3RD Q SCIENCE SCIENCE SCIENCE .pptx

VOLCANOES
(Part, Types,
and
Classification)
Presenter Name: Ma,am
Lyn
Quarter 3
EARTH SCIENCE
LECTURE NO.1

Magma is the molten rock
beneath the earth surface
Crater is the mouth of a volcano, it surrounds a volcanic vent
Ash Cloud it is a cloud of ash that formed in a
volcanic explosion
Ash the layer of ash or
fragment of lava or rocks
smaller than 2 millimeter in
size that are blasted into the
air by volcanic explosion
Lava is molten or partially
molten rocks (magma) that has
been expelled from the interior of
a terrestrial planet such as earth.
Sill is a flat piece of rocks,
forms when magma harden in
crack in a volcano
Magma Chamber
this is where
magma is formed
Laccolith is a sheet like
intrusion, that has been injected
within or between layers of the
sedimentary rocks.
Parasitic Cone (adventive
or satellite cone) the cone-
shaped accumulation of
volcanic material not part
of central vent of a volcano
Vent is an opening into earth
surface, through which volcanic
materials escape
Magma the term is used for molten
rocks that is underground
Lava is used for molten rocks that
breaks through the earth surface.

ADVANTAGES
- Geothermal energy
Tourism
- Fertile soil for farming
- Mining for minerals
DISADVANTAGES
- Lava flows can
destroy buildings
- Ash can choke
people and cover
buildings leading to
collapse
- Impact of transport –
lava can cut across
roads and ash can

2/11/20XX PRESENTATION TITLE 17

Active and Inactive

As the magma is continuously heated, it goes
up
As magma rises, gas bubbles are developed pressure inside the
volcano increases due to trapped bubbles within it.

SCIENCE 9- 3RD Q SCIENCE SCIENCE SCIENCE .pptx

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