Volcanic activities include the ____ in the mantle which became thick molten materials called ____. Magma moves ____ and accumulates in an area called ____. High ____ and ____ push magma through the openings like ____ and fractures. The magma then oozed out to form a lava dome but do not cause any explosive eruption. Gas-charged magma reaches the surface and explode. The presence of ____ enables the molten materials to ____ More highly gas charged magma reaches the ____ and the ____ explodes.

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