Magma
/mˈæɡmə/
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Definition
(noun) A mixture of molten silicate rock, crystals, and gas within the earth, which may be erupted as lava or cool in place to form igneous intrusions.
Sentence Examples
Magma from the mantle or lower crust rises through its crust towards the surface.
CEFR Practice Quiz
The volcano erupted, sending a large stream of molten ____ down its slopes and into the nearby valley.