1. List the volcanoes in order of steepness

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Presentation transcript:

1. List the volcanoes in order of steepness Warmup 1. List the volcanoes in order of steepness

7.2 Volcanoes

Volcanoes Volcano-a vent or fissure in the Earth’s surface through which magma and gases are expelled Magma chamber-the body of molten rock that feeds a volcano Volcanic Bomb-Magma that hardens in midair Pyroclastic flow-glowing cloud of volcanic material that can move faster than 200km/h

Shield volcano- a volcano built form layers of released from repeated nonexplosive eruptions

Composite volcano- form from alternating explosive and nonexplosive eruptions

Cinder cone- volcanoes made of layers of pyroclastic materials from moderately explosive materials

Volcanic Landforms Hotspot- a volcanically active area of Earth’s surface far from a tectonic plate boundary

Riftzone- an area of deep cracks that form between two tectonic plates that are pulling away from each other Lavaplateau- a wide, flat landform that results from repeated nonexplosive eruptions of the lava that spread over a large area

Crater- a funnel-shaped pit near the top of the central vent of a volcano Caldera- a large, semi circular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink