( Evaporation ( ( is ( ( the transformation ) ( of ( water ( from ( ( liquid ( to vapor ) ) state ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Evaporation)) (VP (VBZ is) (NP (NP (DT the) (NN transformation)) (PP (IN of) (NP (NP (NN water)) (PP (IN from) (NP (ADJP (JJ liquid) (PP (TO to) (NP (NN vapor)))) (NN state))))))) (. .)))
Evaporation is the transformation of water from liquid to vapor state.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (JJ liquid) (NN water) (NNS changes)) (VP (TO to) (VP (VB water) (NP (NN vapor)))))) (NP (PRP it)) (VP (VBZ is) (VP (VBN called) (NP (NN evaporation)))) (. .)))
When liquid water changes to water vapor it is called evaporation.