(Jon of the Clue Crew makes a chemical volcano.)  Mixing hydrogen peroxide & yeast creates foam, steam & notably causes heat to be given off in this type of 10-letter chemical reaction
The steam that is so commonly given off during volcanic 
eruptions is... [DOC] [TLE] Laboratory Directed Research - wiki.ornl.gov - Oak Ridge National ... [PAR] Characterization of the Structure and Chemistry of Nanophase Materials.