During an eruption, molten rock (magma) found below the surface of the earth rises in volcanic vents forming a substance called lava.
(volcanic vents; forming; a substance called lava) (a substance; called; lava) (molten rock; found; L:below the surface of the earth; rises in volcanic vents; T:During an eruption)
volcanic vents a substance molten rock
forming called found
a substance called lava
lava
L:below the surface of the earth rises in volcanic vents T:During an eruption