( ( ( The space ) ( between ( ( the particles ) ( of gas ) ) ) ) ( also ( ( decreases ( with ( increase ( in pressure ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (NN space)) (PP (IN between) (NP (NP (DT the) (NNS particles)) (PP (IN of) (NP (NN gas)))))) (ADVP (RB also)) (VP (VBZ decreases) (PP (IN with) (NP (NP (NN increase)) (PP (IN in) (NP (NN pressure)))))) (. .)))
The space between the particles of gas also decreases with increase in pressure.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN gas) (NNS particles)) (VP (VB heat) (PRT (RP up))))) (, ,) (NP (NN pressure)) (VP (VBP increase)) (. .)))