( Evaporation ( ( ( describes ( the change ) ) ( from ( water ( as ( a ( liquid ( to ( water ( as ( a vapor ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Evaporation)) (VP (VBZ describes) (NP (DT the) (NN change)) (PP (IN from) (NP (NP (NN water)) (PP (IN as) (NP (DT a) (NN liquid) (S (VP (TO to) (VP (VB water) (PP (IN as) (NP (DT a) (NN vapor))))))))))) (. .)))
Evaporation describes the change from water as a liquid to water as a vapor.
(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.