( ( ( ( ( Move ( ( water molecules ) ( slow enough ) ) ) , ) and ) ( they ( turn ( to ( a solid ) ) ) ) ) . )
(ROOT (S (S (VP (VB Move) (S (NP (NN water) (NNS molecules)) (ADJP (JJ slow) (NN enough))))) (, ,) (CC and) (S (NP (PRP they)) (VP (VBP turn) (PP (TO to) (NP (DT a) (JJ solid))))) (. .)))
Move water molecules slow enough, and they turn to a solid.
(ROOT (S (PP (IN As) (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (NN water) (NNS decreases))))) (, ,) (NP (DT the) (NN water) (NNS molecules)) (VP (VB slow) (PRT (RP down))) (. .)))