( Geysers ( ( are ( ( ( powered ( by ( ( the change ) ( of ( superheated water ) ) ) ) ) ( to steam ) ) ( as ( it ( nears ( ( Earth 's ) surface ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Geysers)) (VP (VBP are) (VP (VBN powered) (PP (IN by) (NP (NP (DT the) (NN change)) (PP (IN of) (NP (JJ superheated) (NN water))))) (PP (TO to) (NP (NN steam))) (SBAR (IN as) (S (NP (PRP it)) (VP (VBZ nears) (NP (NP (NNP Earth) (POS 's)) (NN surface))))))) (. .)))
Geysers are powered by the change of superheated water to steam as it nears Earth's surface.
(ROOT (S (NP (NNS Geysers)) (VP (VBP are) (VP (VBN created) (SBAR (WHADVP (WRB when)) (S (NP (NN water)) (VP (VBZ is) (VP (VBN heated) (PP (IN beneath) (NP (NP (DT the) (NN earth) (POS 's)) (NN surface))))))))) (. .)))