how does auolcano explode – Climate Change Zone

Question: how does auolcano explode
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Asked by 227cmte47 to Gabriel, Cat? on 18 Mar 2016. This question was also asked by 248cmte35.
- Cat Scott ? answered on 18 Mar 2016:
  
  Hey guys! ?
  
  The lava rises up inside the volcano becuase it is less dense than the rocks that surround it, when it arrives at the surface it bursts out of the top!

Question: how does auolcano explode