6.-Parts-of-Volcanoes.ppt
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A volcano forms when magma rises from below the Earth's surface due to its lower density than the surrounding solid rock. The main parts of a volcano include the vent, where magma escapes; the magma chamber, which is the source of magma; and the crater at the top. There are three main types of volcanoes classified by how they form - shield volcanoes which have wide, flat shapes from quiet eruptions; cinder cone volcanoes which are tall with steep sides and explosive eruptions; and composite volcanoes which have more destructive eruptions and form from layers of ash and lava.
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Parts of volcanoes
A volcano forms when magma reaches the Earth's surface. It has key parts including a vent, crater, fissures, and conduits. There are three main types of volcanoes - shield volcanoes which erupt quietly and form wide, flat shapes; cinder cone volcanoes which have explosive eruptions forming steep, tall cones; and composite volcanoes which are smaller with steep sides and erupt explosively producing lava and ash.
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The document defines key terms related to volcanoes such as magma chamber, central vent, conduit, and crater. It then describes the three major types of volcanoes: cinder cone volcanoes, shield volcanoes, and composite volcanoes. Cinder cone volcanoes are small and steep sided, building from lava fragments. Shield volcanoes form large, gentle sloped mountains from slowly flowing lava. Composite volcanoes have steep, layered sides and can erupt explosively without warning.
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The document defines a volcano as a vent or chimney connecting molten rock from within the Earth's crust to its surface. It describes key parts of a volcano including vents, craters, magma chambers, flanks, summits, ash clouds, lava/magma, and conduits. It also explains the difference between quiet and explosive eruptions and notes benefits of volcanoes such as fertile soil and new land formations.
Parts of volcano
The document defines a volcano as a vent or chimney connecting molten rock from within the Earth's crust to its surface. It describes key parts of a volcano including vents, craters, magma chambers, flanks, summits, ash clouds, lava/magma, and conduits. It also explains the difference between quiet and explosive eruptions and notes benefits of volcanoes such as fertile soil and new land formations.
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Volcanoes form at subduction zones, hot spots, and through plate tectonics. There are three main types of volcanoes - shield volcanoes which erupt fluid basalt and form broad slopes, cinder cones which erupt explosively and form small steep slopes, and composite volcanoes which alternate between explosive and nonexplosive eruptions forming tall steep shapes. The type of eruption depends on factors like the viscosity, gas and water content of the magma.
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Volcanoes form when magma rises from below the Earth's surface and erupts through openings called vents. As magma accumulates in underground chambers, it can build up conical mountains at the vents. There are three main types of volcanoes defined by their shape and eruptive behavior: cinder cones are small and steep; shield volcanoes are broad with gentle slopes; and composite volcanoes are tall with alternating layers of ash and lava. Volcanoes can be active, dormant, or extinct depending on their history of recent eruptions.
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Parts of volcanoes
A volcano forms when magma reaches the Earth's surface. It has key parts including a vent, crater, fissures, and conduits. There are three main types of volcanoes - shield volcanoes which erupt quietly and form wide, flat shapes; cinder cone volcanoes which have explosive eruptions forming steep, tall cones; and composite volcanoes which are smaller with steep sides and erupt explosively producing lava and ash.
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1. It defines a volcano as a vent that connects magma to the Earth's surface and describes the main parts of a volcano including the crater, vent, lava, and magma chamber.
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- 1. The Parts of a Volcano
- 2. What is a Volcano? A volcano is a mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense than the solid rock around it.
- 3. What are the parts of a Volcano?
- 4. Structure of an active volcano Sketch and label this diagram in your notes Crater: the depression at the top of a volcano Vent: Location where magma escapes from the volcano. Lava Pipe: Connects the vent to the Magma Chamber Magma Chamber: the source of magma for a volcano
- 5. Types of Volcanoes • There are 3 types of Volcanoes: Shield Cinder Cone Composite • They are classified by how they form.
- 6. Shield Volcano • Is wide and somewhat flat. • It forms from a quiet eruption. • Lava flows out quietly and for great distances. • Layers of ash and lava • Resemble a warriors shield
- 7. Cinder Cone Volcano Has tall, very steep sides. Has explosive eruptions. This eruption produces a lot of cinder and ash. Usually only erupts once After the eruption the volcano never erupts again because of their short life span these volcanoes are relatively small.
- 8. Composite Volcano Composite Cones are formed from alternating layers of ash and lava. - These have the most destructive eruptions
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- 11. Batholith: When the main magma chamber stops receiving heat from the earth's interior it becomes a solid igneous rock. Laccoliths: Form when magma fills chambers near the surface, but to the side of a volcano.