Your SlideShare is downloading. ×
Volcanoes
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Volcanoes

1,745
views

Published on

Published in: Education, Technology

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
1,745
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
80
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Understanding Volcanoes
  • 2. What is a volcano? Volcano is an opening in the earth’s crust where lava, pyroclasts and gasses are ejected onto the surface during eruptions. Mt. Mayon Mt. Kilauea Mt. Vesuvius
  • 3. Parts of a Volcano  Cone- the most prominent part of a volcano -formed by the mountainous accumulation of volcanic materials Mt. Mayon
  • 4. Parts of a Volcano  Crater- a steeped-wall *Caldera-a very large depression at the peak of crater that can the volcano and the exceed for about 1 volcanic vent. km in diameter; they are formed when the summit of the volcano collapses during violent or explosive eruptions.
  • 5. Lava vs. Magma Magma are molten rocks found beneath the earth’s surface. Lava are molten rocks that flowed out of the earth’s surface.
  • 6. Kinds of Volcano according to Shape and Composition  Cinder cone volcano- made up of loose fragments called cinders (pyroclasts and tephra) -it is formed from explosive eruption. -it has a narrow base and a steep slope Examples: Sunset Crater in Arizona, Mt. Pelee’ in the East Indies
  • 7. Kinds of Volcano according to Shape and Composition  Shield cone volcano- has a wide base with gently sloping sides. It is made up purely of solidified lava. Examples: Mauna Kea and Kilauea Volcano in Hawaii, Olympus Mons in Mars
  • 8. Kinds of Volcano according to Shape and Composition  Composite Volcano- composed of alternating layers of lava and cinders. It is formed when volcanic eruptions vary between quiet and violent and explosive. Examples: Mt. Fuji in Japan, Mt. Vesuvius and Mt. Stromboli in Italy and Mt. Mayon in the Philippines
  • 9. Kinds of Volcano according to Activity Active Dormant/Inactive Extinct
  • 10. Kinds of Volcanic Eruption  Violent or Plinian Eruption
  • 11. Kinds of Volcanic Eruption  Non-explosive or Quiet Eruption
  • 12. Benefits of Volcanic Eruption agricultural benefits  energy benefits industrial benefits tourism and recreational benefits
  • 13. Dangers of Volcanic Eruption volcanic gasses  lava flows  lahar  global warming
  • 14. Before a Volcanic Eruption
  • 15. During a Volcanic Eruption
  • 16. After a Volcanic Eruption

×