( ( ( evaporation -- ) ( loss ( of ( water ( from ( ( a system ) ( by ( ( a change ) ( of ( phase ( from ( liquid ( to vapor ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NN evaporation)) (: --) (NP (NP (NN loss)) (PP (IN of) (NP (NP (NN water)) (PP (IN from) (NP (NP (DT a) (NN system)) (PP (IN by) (NP (NP (DT a) (NN change)) (PP (IN of) (NP (NP (NN phase)) (PP (IN from) (NP (NP (NN liquid)) (PP (TO to) (NP (NN vapor)))))))))))))) (. .)))
evaporation --loss of water from a system by a change of phase from liquid to 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.