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Volcanoes  Volcanoes form at weak spots in the Earth’s crust.  Magma is a molten mixture of rocky substances. It forms within the Earth in the Magma.

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Presentation on theme: "Volcanoes  Volcanoes form at weak spots in the Earth’s crust.  Magma is a molten mixture of rocky substances. It forms within the Earth in the Magma."— Presentation transcript:

1 Volcanoes  Volcanoes form at weak spots in the Earth’s crust.  Magma is a molten mixture of rocky substances. It forms within the Earth in the Magma chamber  Lava forms when magma reaches the Earth’s surface and erupts from the volcano crater

2 Volcano Model Lab  Terms  Volcano - a vent (opening) at the Earth's crust through which magma (molten rock) and associated gases erupt.  Magma - molten rock beneath the surface of the Earth.  Lava - magma that has reached the surface.  Cinders - lava fragments about 1 centimeter in diameter.  Pyroclastics (“fire fragments”) - ash, cinders, angular blocks, and rounded bombs (block and bomb fragments can be over 1 meter in diameter).  Explosive eruptions – eject lava and pyroclastics.  Quiet eruptions – fluid lava flows out of a volcano's vent.

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4 Types of volcanoes Compare and contrast. This means to state how they are the same and how they are different

5 Types of Volcanoes

6 What determines lava flow?  Name 3 features that determine lava flow. In other words, state the factors that make lava flow quickly or slowly.  1-  2-  3- Complete WB pages 63-71

7 Research time. Locate 3-5 facts for each type of volcano.


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