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Brechbill Volcanoes
| Question | Answer |
|---|---|
| Molten rock above the earth's crust | lava |
| Molten rock inside the earth | magma |
| Fragments of rock and lava that are spewed during an eruption | tephra |
| Explosion of hot gas and rock that plow down the side of a volcano after an eruption | pyroclastic cloud |
| Gaseous, magma-filled cavity beneath earth's surface | magma chamber |
| Largest volcanoes | shield volcano |
| Volcanoes with low viscous, fast moving lava | shield volcano |
| Kilauea and Mauna Loa are examples of a ______. | shield volcano |
| Most violent type of volcano | composite volcano |
| Composite volcanoes are also known as ___. | stratovolcanoes |
| Type of volcano with highly viscous, slow moving lava that explodes with lots of debris | composite volcano |
| An example of a composite volcano that erupted in Pompeii, Italy in 79 AD. | Vesuvius |
| Most common and simplest type of volcano with low viscous lava and glassy rock fragments | cinder cone |
| Rare volcano found at the tops of larger volcanoes | lava dome |
| The thickness of lava and magma determined by silica and gas content and temperature. | viscosity |
| An area in the mantle where heat rises in the form of a thermal plume, creating islands. | hotspot |
| Most dangerous volcanoes occur at a ________ plate boundary. | subducting |
| _______ boundaries are where magma pushes between the plates as the plates move apart. | divergent |
| The ________ is a region of high volcanic and seismic activity surrounding the Pacific plate. | Ring of Fire |
| Which moves: the island or the hotspot? | the island |
| A _________ is a scientist that studies volcanoes. | volcanologist |
| The long tube in the ground that connects the magma chamber to the surface is called the ____. | pipe |
| When groundwater is heated by magma and collects in a natural pool it is called a ____. | hotspring |
| What is responsible for making magma erupt to the surface? | trapped gases |
| A volcano that is not predicted to ever erupt again. | extinct |
| A volcano that is sleeping and may erupt in the future. | dormant |
| A volcano that is erupting or expected to erupt in the near future. | active |
| The main hazard from a quiet eruption is ____. | lava flows |
| cooler, slower moving, pillow-like lava. | pahoehoe |
| fast moving, jagged lava | Aa |
| The magma's viscosity is most directly related to the ____ content. | silica |
| Mudflow due to the rapid melting of snow during a volcanic eruption. | lahar |
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brechbillc
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