Post on 17-Aug-2015
A. Definition
1.Volcano – is an opening (or rupture) in the surface or crust of Earth which allows hot, molten rock, ash and gases to escape from deep below the surface.
A. Definition
2. Ring of Fire – is the region where more than half of the active volcanoes of the world that are above sea level are located or found.
D. Kinds of Volcanoes
1. Composite/Strato Volcanoes are formed by alternating layers of lava and
rock fragments erupt in an explosive way
D. Kinds of Volcanoes
2. Shield Volcanoes are among the biggest volcanoes are made of many layers of runny lava flows low-explosivity
D. Kinds of Volcanoes
3. Cinder Cone Volcanoes are made of lava fragments called cinders low-explosivity
E. Categories of Volcanoes
if it has erupted recently or about 10 000 years ago
• Also called Dormant
• If it rarely has a record of previous eruption
Active Inactive
F. Kinds of Volcanic Eruptions
1. Eruptive Pulse an explosion with eruption plume may last from a few seconds to
minutes
F. Kinds of Volcanic Eruptions
2. Eruptive Phase numerous eruptions that may
alternate between plume and lava surges
may last from a few hours to days
F. Kinds of Volcanic Eruptions
3. Eruptive Episode is composed of several phases
that may last a few days, months or years
Directions: Classify the effects of Volcanic eruptions as Beneficial or Harmful. Put the effects in their corresponding column.
Directions: Answer the following questions.
1. What is a volcano?2-4.How are volcanoes formed?5-8. What are the parts of a volcano?9-10. What are the categories of Volcanoes?
11-13. What are the classifications of Volcanoes?14. Give 1 beneficial effect of Volcanic eruptions15. Give 1 harmful effect of Volcanic eruptions