 Some scientists believe that volcanoes played a role in the extinction of the dinosaurs. Some scientists also have said that volcanoes could play a major.

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Presentation transcript:

 Some scientists believe that volcanoes played a role in the extinction of the dinosaurs. Some scientists also have said that volcanoes could play a major role in the future of mankind.  On your paper write your prediction for how volcanoes could affect the future of human beings.  Today’s Schedule  1. Schedule for the upcoming week.  2. Volcanoes’ Effects on Earth

 Monday- Ch. 9 Sec, 2: Volcanoes’ Effects on Earth  Tuesday- Types of Volcanoes Lab  Wednesday- Ch. 9 Sec. 3 What causes volcanoes?  Thursday- Volcano Pre-Test/How the Earth was Made  Friday- Volcano Pre-Test/How the Earth was Made  Next Monday- Review  Next Tuesday- Ch. 9 Volcanoes Test

 How do volcanoes effect the Earth and life on the Earth?  Destroy landforms  Build new land  Change the climate  Kill plants and animals

 So we can be prepared.  So lives can be saved.  Assignment Discovery Shorts: Man vs. Volcano : Video : Discovery Channel Assignment Discovery Shorts: Man vs. Volcano : Video : Discovery Channel

 1,000 times more powerful than Mt. St. Helens.  Ash 10 ft. deep would cover the ground for up to 1,000 miles away.  2/3’s of the U.S.A. would become uninhabitable due to toxic gasses.  Air travel would stop across the U.S.A.  Millions of people would be homeless.  Assignment Discovery Shorts: Yellowstone?s Super Eruption : Video : Discovery Channel Assignment Discovery Shorts: Yellowstone?s Super Eruption : Video : Discovery Channel

 What type of eruption has the greatest effects?  Explosive

 Flows and Fallout  Climatic Changes  Open your book to page 227

 The different types of eruptions (quiet/explosive) also cause different types of volcanoes to form.

 Shield Volcanoes- form when layers of low viscosity lava harden on top of previous layers. A wide gently sloping mountain forms.

 Cinder Cone Volcanoes- form when ash, cinders, and bombs build up around the vent in a steep, cone shaped hill.  Assignment Discovery Shorts: Paricutin : Video : Discovery Channel Assignment Discovery Shorts: Paricutin : Video : Discovery Channel

 Composite Volcanoes- tall, cone-shaped mountains in which layers of lava alternate with layers of ash.