What are some substances that affect the explosiveness of volcanic eruptions?

Answer

During a volcanic erucption, substances like tephra, lava and other gasses are expelled from the volcanic vent through an eruption. The circumstances that affect the explosiveness of a volcano include; the mount of dissolved gasses in a liquid. The content of Silica in the lava and the viscosity of the magma.
Q&A Related to "What are some substances that affect the explosiveness..."
certainly NOT He! The main one is water. along with other common volatiles CO2 and Cl. As these increase, so does explosiveness. Higher silica lavas are more likely to be explosive.
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Volatile content (dissolved gasses etc) and silica content of the magma.
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The quickest and most obvious effect of volcanic eruptions comes from dust that is released into the atmosphere. Large dust particles settle quickly and therefore only affect the
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