Flashcards
Volcanoes
Cards in this deck (28)
- 1What is the world's most active volcano?Kilauae
- 2A vent in Earth's Surface made of lava and volcanic ash, which erupts and builds upVolcano
- 3A magma’s viscosity is directly related to its ____.silica content
- 4As the temperature of lava increases,its viscosity_____.decreases
- 5piece of semi-molten rock ejected as glowing lava is a ____.volcanic bomb
- 6The particles produced in volcanic eruptions are called ____.pyroclastic material
- 7Large particles of hardened lava ejected from a volcano are called ____.blocks
- 8What is the most abundant gas associated with volcanic activity?water vapor
- 9What type of volcano is built almost entirely from ejected lava fragments?cinder cone
- 10The broad, slightly dome-shaped volcanoes of Hawaii are ____.shield volcanoes
- 11A volcano that is fairly symmetrical and has both layers of lava and pyroclastic deposits is a ____.composite cone volcano
- 12What plays a major part in determining the form of a volcano?magma composition
- 13The most violent volcanic eruptions are associated with what type of volcano?composite cones
- 14Magma forms when solid rock in the crust and upper mantle ____.melts
- 15Magma tends to rise towards Earth’s surface primarily because ____.rocks become less dense when they melt
- 16Most of the active volcanoes on Earth are located in a belt known as the ____.Pacific Ring of Fire
- 17A material’s ____________________ is a measure of its resistance to flow.Viscosity
- 18The change in temperature with depth is the ____________________ gradient.geothermal
- 19A large depression in a volcano after it collapses into the magma chamberA caldera
- 20The volcanic landform that is formed when the volcanic pipe remains after most of the cone has been eroded is called a ____.volcanic neck
- 21Structures that form from the cooling and hardening of magma beneath Earth’s surface are ____.plutons
- 22The largest intrusive igneous formed when the magma chamber cools is called a ____.batholith
- 23Which type of intrusive feature forms when magma is injected into fractures cutting across preexisting rock layers?dike
- 24What commonly horizontal intrusive igneous body is formed when magma is injected parallel to sedimentary bedding planes?sill
- 25Some magma that forms a sill may continue to push the rock layers upward, forming a dome shape called alaccolith
- 26What is the structure labeled 10?Magma Conduit
- 27What is the structure labeled #4?Central Vent
- 28What is the structure labeled #3?Summit Caldera
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- 9th Geology Flashcards on Volcanoes, created by Brian Hedspeth on 21/11/2013.
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- Brian Hedspeth
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