( ( As ( ( water evaporates ) ( from ( the oceans ) ) ) ) ( ( , ( ( it ( ( ( enters ( the atmosphere ) ) and ) ( collects ( on ( ( small particles ) ( in ( ( the air ) ( as ( ( droplets or ) ice ) ) ) ) ) ) ) ) ) , ) ) ( ( ( ( ( ( a process ) ( called condensation ) ) , ) and ) ( forms clouds ) ) . ) ) )
(ROOT (S (PP (IN As) (NP (NP (NN water) (NNS evaporates)) (PP (IN from) (NP (DT the) (NNS oceans))))) (PRN (, ,) (S (NP (PRP it)) (VP (VP (VBZ enters) (NP (DT the) (NN atmosphere))) (CC and) (VP (VBZ collects) (PP (IN on) (NP (NP (JJ small) (NNS particles)) (PP (IN in) (NP (NP (DT the) (NN air)) (PP (IN as) (NP (NNS droplets) (CC or) (NN ice)))))))))) (, ,)) (S (NP (DT a) (NN process)) (VP (VBD called) (NP (NN condensation)))) (, ,) (CC and) (S (NP (NNS forms)) (VP (VBZ clouds))) (. .)))
As water evaporates from the oceans, it enters the atmosphere and collects on small particles in the air as droplets or ice, a process called condensation, and forms clouds.
(ROOT (S (NP (NNP Condensation)) (VP (MD must) (VP (VB occur) (PP (IN for) (NP (NNS clouds))) (S (VP (TO to) (VP (VB form)))))) (. .)))