15 Questions
What type of volcano is Mount Etna in Sicily?
Cinder cone
What type of eruption results from a fissure, or crack, in the Earth's crust?
Fissure eruption
What type of volcano is Mount St. Helens in Washington?
Shield
What forms when a volcano's lava is very thick and forms a pile on top of the volcano?
Lava dome
What type of volcanic landform results from thick, gelatin-like lava that does not flow easily?
Lava dome
What causes the formation of a caldera?
Imploding magma chamber
What type of volcanic eruption results from a build-up of gas?
Maar-diatreme eruption
What type of volcano is Mauna Loa in Hawaii?
Shield
What is the hot, fluid rock that escapes from a volcano during an eruption called?
Lava
How is a volcano formed?
By the cooling and hardening of magma
What causes a volcanic eruption?
Pressure build-up under the Earth's crust
What forms a volcanic pipe?
Accumulation of gas and magma under the Earth's crust
What is the vent or opening in the crust that allows gas, magma, and ash to be released during an eruption?
Vent
Where do most volcanoes form?
Along lines where pieces of the Earth's crust meet
What is released during a volcanic eruption?
Gas, lava, and ash
Learn about the formation and eruption of volcanoes, including how they are created and the materials released during volcanic activity.
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