RAP 1. _layer of the Earth that has the highest pressure, density, and temperature (layers of Earth) 2._the boundary that occurs where the crust and.

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Eruptions and Forms of Volcanoes

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Presentation transcript:

RAP 1. ___layer of the Earth that has the highest pressure, density, and temperature (layers of Earth) 2.___the boundary that occurs where the crust and mantle meet and seismic waves increase in speed (seismology) 3. ___point inside the Earth where an earthquake begins (earthquakes)

Volcano Key Questions What are the 3 types of volcanoes? What are shield volcanoes? What are cinder cone volcanoes? What are composite volcanoes?

1. What are the three types of volcanoes? 1. The three types of volcanoes are shield, cinder cone, and composite.

2. What are shield volcanoes? Made of runny lava and basalt Non explosive eruptions Gentle sloping sides Wide base Forms underwater

3. What are cinder cone volcanoes? Made of pyroclastic material Explosive eruptions Steep sides Narrow base Found in clusters on shield and composite Erode quickly because there is no lava to cement rocks together

4. What are composite volcanoes? Made of lava and pyroclastic material Non explosive and explosive eruptions Steep sides Wide base Also called Strato volcano