Volcanic Eruption StagesVersion en ligne Sort the eruption stages from start to finish. par Mendoza Rhealyn L. 1 Arrange the process of volcanic eruption from 1st to last. Magma rises toward the Earth’s surface. Rocks in the mantle melt due to high temperature, forming magma. The volcano erupts. Magma reaches the Earth’s surface as pressure becomes too strong. Pressure decreases, causing dissolved gases to form bubbles (vesiculation). Magma gathers and builds up inside the magma chamber. Gas bubbles expand and increase pressure inside the volcano.
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