( ( Pressure ( with ( Height pressure ) ) ) ( ( decreases ( with ( ( increasing altitude ) ( ( The number ) ( of ( ( air molecules ) ( above ( ( a ( surface changes ) ) ( as ( ( the height ) ( of ( ( the surface ) ( above ( the ( ground changes ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NN Pressure)) (PP (IN with) (NP (NNP Height) (NN pressure)))) (VP (VBZ decreases) (PP (IN with) (S (VP (VBG increasing) (NP (NN altitude)) (NP (NP (DT The) (NN number)) (PP (IN of) (NP (NP (NN air) (NNS molecules)) (PP (IN above) (NP (NP (DT a) (NN surface) (NNS changes)) (PP (IN as) (NP (NP (DT the) (NN height)) (PP (IN of) (NP (NP (DT the) (NN surface)) (PP (IN above) (NP (DT the) (NN ground) (NNS changes)))))))))))))))) (. .)))
Pressure with Height pressure decreases with increasing altitude The number of air molecules above a surface changes as the height of the surface above the ground changes.
(ROOT (S (S (VP (VBG Reducing) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN in) (NP (DT a) (JJ rigid) (NN container)))))))) (VP (VBZ causes) (NP (NN pressure)) (S (VP (TO to) (VP (VB decrease))))) (. .)))