( ( Liquids ( do ( have ( ( a ( fixed ( ( volume or ) amount ) ) ) ( of space ) ) ) ) ) ( they ( ( take up ) . ) ) )
(ROOT (S (S (NP (NNS Liquids)) (VP (VBP do) (VP (VB have) (NP (NP (DT a) (JJ fixed) (NN volume) (CC or) (NN amount)) (PP (IN of) (NP (NN space))))))) (NP (PRP they)) (VP (VBP take) (PRT (RP up))) (. .)))
Liquids do have a fixed volume or amount of space they take up.
(ROOT (S (NP (DT The) (NN term) (NN volume)) (VP (VBZ means) (SBAR (S (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN space) (NN matter)))) (VP (VBZ takes) (PRT (RP up)))))) (. .)))