Compléter Volcanoes Fill in the BlanksVersion en ligne A fun game to test your knowledge about volcanoes. Fill in the blanks with the correct words to complete the sentences! par Sarah Clarke 1 because When if since when Magma is pushed up through the opening a volcano erupts . Eruptions can cause other natural disasters pressure is released . Volcanoes can be disruptive it spurts out hot ash . Lava and hot ash are released a volcano erupts . a volcano erupts , magma is pushed through the opening .