( ( ( ( ( As ( ( the ( water-vapor-laden air ) ) expands ) ) ( , ( it cools ) ) ) and ) ( ( the vapor ) ( ( ( condenses ( on ( minute particles ) ) ) , ) ( forming ( ( the cloud ) ( we see ) ) ) ) ) ) . )
(ROOT (S (S (SBAR (IN As) (S (NP (DT the) (JJ water-vapor-laden) (NN air)) (VP (VBZ expands)))) (, ,) (NP (PRP it)) (VP (VBZ cools))) (CC and) (S (NP (DT the) (NN vapor)) (VP (VBZ condenses) (PP (IN on) (NP (JJ minute) (NNS particles))) (, ,) (S (VP (VBG forming) (NP (NP (DT the) (NN cloud)) (SBAR (S (NP (PRP we)) (VP (VBP see))))))))) (. .)))
As the water-vapor-laden air expands, it cools and the vapor condenses on minute particles, forming the cloud we see.
(ROOT (S (VP (VB Clouds) (NP (NP (NN form)) (PRN (-LRB- -LRB-) (PRP s) (-RRB- -RRB-)) (SBAR (WHADVP (WRB when)) (S (NP (NN water) (NN vapor)) (VP (VBZ condenses) (PP (IN in) (NP (NP (DT the) (NN air)) (PP (IN around) (NP (NP (NNS specs)) (PP (IN of) (NP (NN matter)))))))))))) (. .)))