
Volcano | Definition, Types, & Facts | Britannica
Nov 26, 2025 · Volcano, vent in the crust of Earth or another planet or satellite, from which issue eruptions of molten rock, hot rock fragments, and hot gases. The term volcano can also refer to the …
volcano - Kids | Britannica Kids | Homework Help
During a volcanic eruption, hot melted rock called magma escapes from a vent, or opening, in Earth’s surface, or crust. Magma released from a volcano is known as lava.
volcano - Students | Britannica Kids | Homework Help
A volcano is a vent, or opening, in Earth’s surface through which molten rock, gases, and ash erupt. Volcano also refers to the landform created by the erupted rock and ash.…
Volcano Definition & Meaning | Britannica Dictionary
VOLCANO meaning: a mountain with a hole in the top or side that sometimes sends out rocks, ash, lava, etc., in a sudden explosion (called an eruption)
Volcanism | Examples, Effects, & Facts | Britannica
Nov 11, 2025 · Volcanism, any of various processes and phenomena associated with the surficial discharge of molten rock, pyroclastic fragments, or hot water and steam, including volcanoes, …
Characteristics of volcanoes | Britannica
volcano, Vent in the crust of the Earth from which molten rock, hot rock fragments, ash, gas, and steam issue. Most volcanoes are found on the boundaries of the enormous plates that make up the Earth’s …
Volcano - Rift, Magma, Eruptions | Britannica
Sep 29, 2025 · Where a lithospheric plate moves over a hot spot, a chain of volcanic islands may be created. As the plate moves, the older volcanoes are transported away from the magma source and …
Volcano - Lava Domes, Magma, Eruptions | Britannica
Nov 26, 2025 · Volcano - Lava Domes, Magma, Eruptions: Landforms of this sort consist of steep domal mounds of lava so viscous that the lava piles up over its vent without flowing away.
Volcano - Hot Springs, Geysers, Magma | Britannica
Nov 17, 2025 · Volcano - Hot Springs, Geysers, Magma: Hot springs and geysers also are manifestations of volcanic activity. They result from the interaction of groundwater with magma or …
Stratovolcano | Shape, Examples, & Facts | Britannica
Nov 3, 2025 · Strictly speaking, the term volcano means the vent from which magma and other substances erupt to the surface, but it can also refer to the landform created by the accumulation of …