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Page 1: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

Volcanoes

Page 2: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

General Volcano Info.• Most of the thousands of

volcanoes on earth are inactive.

• Earth has about 600 active volcanoes right now.

• The most active volcano on earth is Kilauea on the island of Hawaii.

Page 3: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 4: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 5: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 6: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 7: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

Causes of Volcanoes

•1. Divergent Boundaries: Tectonic plates pull apart, lava oozes out.

Page 8: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

•2. Convergent Boundaries: Two plates meet, the ocean plate dives under the continent plate. The melted material forms volcanoes. (Subduction)

Page 9: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 10: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

•3. Hot Spots: Some areas of the mantle are hotter than others. Over these “hot spots” magma forces its way to the surface.

Page 11: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 12: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

Types of Eruptions• 1. Explosive: Sometimes

called a loud eruption, these are explosive, violent eruptions.

• 2. Quiet: In a quiet eruption, lava quietly flows out of a volcano.

Page 13: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

Types of Volcanoes• 1. Shield Volcano: A shield

volcano is formed by quiet eruptions of lava. Kilauea is a shield volcano.

• Gently sloping sides – Low Silica Lava – Not Explosive.

Page 14: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

•2. Cinder Cone Volcano: A cinder cone volcano is an explosive volcano.

•Steep sides - High Silica Lava – Tephra (Ash & Lava) – Explosive – Lava Bombs.

Page 15: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

•Composite or Strato Volcano: Some eruptions are quiet and some are explosive.

•Can be Lava or Tephra. – Medium steep sides – Layers of Lava & Tephra.

Page 16: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

BrainPop

• http://www.brainpop.com/science/theearthsystem/volcanoes/zoom.weml

Page 17: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 18: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 19: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 20: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 21: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 22: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 23: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 24: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 25: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 26: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 27: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 28: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 29: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 30: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 31: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 32: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 33: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active
Page 34: Volcanoes. General Volcano Info. Most of the thousands of volcanoes on earth are inactive. Earth has about 600 active volcanoes right now. The most active

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