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Vocanoes
Types of Volcanoes, Types of Lava, Types of Proclastic Material, etc.
| Question | Answer |
|---|---|
| This forms when a magma chamber that supplies material to a volcano empties and its roof collapses | Caldera |
| Small volcanic cones made entirely of pyroclastic material from moderately explosive eruptions. | Cinder Cone Volcanoes |
| Volcanoes that are formed by explosive eruptions of pyroclastic material followed by quieter outpourings of lava. | Composite Volcanoes |
| The place where two tectonic plates collide. | Convergent boundary |
| A funnel-shaped pit at the top of the central vent in most volcanoes. | Crater |
| When two tectonic plates separate and move away from each other. | Divergent boundary |
| Places on the Earth's surface that are directly above columns of rising magma. | Hot Spots |
| magma that flows onto the Earth's surface | Lava |
| Consists of rock fragments created by explosive volcanic eruptions. | Pyroclastic Material |
| A type of volcano that is built out of layers of lava from repeated nonexplosive eruptions. | Shield Volcanoes |
| A mountain that forms when molten rock, called magma, is forced to the Earth's surface. | Volcano |
| the plate boundaries surrounding the Pacific Ocean have so amny volcanoes that these boundaries together are called __________. | Ring of Fire |
| this type of eruption produce lava flows or Lava Fountains | Non-explosive eruptions |
| this type of eruption produces pyroclastic material which shoot into the air | Explosive Eruption |
| cool, thick, slow moving lava; jumbled heaps of sharp-edged chunks | Blocky lava |
| slow moving (like wax); glassy surface with rounded wrinkles | Pahoehoe (pah HOY hoy) |
| quick moving lava with a jagged surface | Aa (AH ah) |
| thin lava that erupts underwater; forms rounded lumps | Pillow lava |
| largest pieces of proclastic material; consist of solid rock blasted out of the volcano | Volcanic blocks |
| means "little stones" in Italian, are pebble-like bits of magma that become solid before they hit the ground. | Lapilli (lu PILL ee) |
| forms when gases in stiff magma expand rapidly and the walls of the gas bubbles explode into tiny glasslike slivers. | Volcanic ash |
| deep crack that forms when tectonic plates separate and allows matle material to rise | rift |
| Magma rises through holes in the Earth's crust called _______. | vents |
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audiree
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