Question

a volcano is a vent through which molten rock and gas escape from a magma chamber. true false when subduction takes place, partial melting of the crust generates a silica - rich magma. true false match the items. mafic and basaltic volcanoes andesitic volcanic felsic and rhyolitic volcanoes submit

Explanation:

1. A volcano is defined as a vent for molten rock (magma/lava) and gas from a magma chamber.
2. Subduction zones involve partial melting of crust (often continental or oceanic crust with high silica content), producing silica-rich magma.
3. Mafic/basaltic volcanoes are quiet; andesitic are moderately explosive; felsic/rhyolitic are extremely explosive.

Answer:

1. True
2. True
3. Mafic and Basaltic Volcanoes - Fairly quiescent, intermediate; Andesitic Volcanic - Moderately explosive; Felsic and Rhyolitic Volcanoes - Extremely explosive