( Accordingly ( , ( ( ( an increase ) ( in pressure ) ) ( ( will ( ( cause ( an increase ) ) ( in ( ( ( density ( of ( the gas ) ) ) and ) ( ( a decrease ) ( in ( its volume ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Accordingly)) (, ,) (NP (NP (DT an) (NN increase)) (PP (IN in) (NP (NN pressure)))) (VP (MD will) (VP (VB cause) (NP (DT an) (NN increase)) (PP (IN in) (NP (NP (NP (NN density)) (PP (IN of) (NP (DT the) (NN gas)))) (CC and) (NP (NP (DT a) (NN decrease)) (PP (IN in) (NP (PRP$ its) (NN volume)))))))) (. .)))
Accordingly, an increase in pressure will cause an increase in density of the gas and a decrease in its volume .
(ROOT (S (SBAR (IN If) (S (NP (NP (DT a) (NN gas)) (PP (IN in) (NP (DT a) (VBN closed) (NN area)))) (VP (VP (VBZ experiences) (NP (NNS increases)) (PP (IN in) (NP (NN pressure)))) (CC and) (VP (VBZ decreases) (PP (IN in) (NP (NNS temperatures))))))) (, ,) (NP (NP (DT the) (NN volume)) (PP (IN of) (NP (DT the) (NN gas)))) (VP (MD will) (VP (VB be) (VP (VBN affected)))) (. .)))