( ( ( ( The ( kinetic theory ) ) ( of gases ) ) ( -LRB- ( ( also ( known ( as ( kinetic-molecular theory ) ) ) ) -RRB- ) ) ) ( ( is ( ( a law ) ( that ( explains ( ( the behavior ) ( of ( a ( hypothetical ( ideal gas ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (DT The) (JJ kinetic) (NN theory)) (PP (IN of) (NP (NNS gases)))) (PRN (-LRB- -LRB-) (VP (ADVP (RB also)) (VBN known) (PP (IN as) (NP (JJ kinetic-molecular) (NN theory)))) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT a) (NN law)) (SBAR (WHNP (WDT that)) (S (VP (VBZ explains) (NP (NP (DT the) (NN behavior)) (PP (IN of) (NP (DT a) (JJ hypothetical) (JJ ideal) (NN gas))))))))) (. .)))
The kinetic theory of gases (also known as kinetic-molecular theory) is a law that explains the behavior of a hypothetical ideal gas.
(ROOT (S (NP (NP (DT The) (NN behavior)) (PP (IN of) (NP (JJ ideal) (NNS gases)))) (VP (VBZ is) (VP (VBN explained) (PP (IN by) (NP (JJ kinetic) (JJ molecular) (NN theory))))) (. .)))
The behavior of ideal gases is explained by kinetic molecular theory.