science10 lesson

1. KINDS OF
VOLCANOES
Quarter 1 Lesson 2

2. Have you seen a volcano?
How will you describe a
volcano?
Can you name parts of a
volcano?

3. Volcanoes are generally
described as mountains
that emit volcanic
products like lava,
mountains, ashes and
gases from the interior of
the Earth through its
vents.

4. Volcanoes are classified
according to;
1. Shape and structure
2. Volcanic Activity

5. Types of Volcanoes based on their shape and
structure
1. Cinder Cone Volcano
- simplest type of volcano
- built from particles and blobs of congealed lava ejected from a
single vent
- As the gas-charged lava is blown violently into the air, it breaks into
small fragments that solidify and fall as cinders around the vent to form a
circular or oval cone.
- Most cinder cones have a bowl-shaped crater at the summit and
rarely rise more than a thousand feet or so above their surroundings

7. 2. Shield Volcano
-are built almost entirely of fluid lava flows and
creates a wide base
- Flow after flow pours out in all directions
from a central summit vent, or group of vents,
building a broad, gently sloping cone of flat,
domical shape, with a profile much like that of a
warrior's shield

8. Mt Iraya

9. Mt Kanlaon

10. 3. Composite or Stratovolcano
- the Earth's grandest mountains
are composite volcanoes
- They are typically steep-sided, symmetrical cones
of large dimension built of alternating layers of lava
flows, volcanic ash, cinders, blocks, and bombs and may
rise as much as 8,000 feet above their bases.
- have a crater at the summit which contains a central
vent or a clustered group of vents.

12. Types of Volcanoes based on their behavior
1. ACTIVE VOLCANO
Volcanoes that are currently erupting or are expected to erupt in
the near future
2. DORMANT VOLCANO
These volcanoes have not erupted for a very long time but may
erupt at a future time
3. EXTINCT VOLCANO
These volcanoes are considered as dead and are not expected to
erupt in the future