The main causes of explosive volcanism are (select all that apply)

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Answer

The viscosity of the melt. Gas cannot escape from highly viscous melts resulting in explosive eruptions.

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The degree of melting. Large degrees of melting promote explosive volcanism.

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The depth of melting. Deep melting promotes more violent eruptions

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The temperature. Hotter melts are more explosive than cooler melts.

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Water. The vapour pressure at shallow depths causes explosive volcanism.

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