( ( Thermal energy ) ( ( is ( ( the ( total ( kinetic energy ) ) ) ( of ( ( all ( the particles ) ) ( in ( a system ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Thermal) (NN energy)) (VP (VBZ is) (NP (NP (DT the) (JJ total) (JJ kinetic) (NN energy)) (PP (IN of) (NP (NP (PDT all) (DT the) (NNS particles)) (PP (IN in) (NP (DT a) (NN system))))))) (. .)))
Thermal energy is the total kinetic energy of all the particles in a system.
(ROOT (S (NP (JJ Thermal) (NN energy)) (VP (VBZ constitutes) (NP (NP (DT the) (JJ total) (JJ kinetic) (NN energy)) (PP (IN of) (NP (PDT all) (DT the) (NNS atoms) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (PRT (RP up)) (NP (DT an) (NN object))))))))) (. .)))