( ( ( This mechanism ) ( for ( ( transferring ( thermal energy ) ) ( by contact ) ) ) ) ( ( is ( called conduction ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN mechanism)) (PP (IN for) (S (VP (VBG transferring) (NP (JJ thermal) (NN energy)) (PP (IN by) (NP (NN contact))))))) (VP (VBZ is) (VP (VBN called) (NP (NN conduction)))) (. .)))
This mechanism for transferring thermal energy by contact is called conduction .
(ROOT (S (NP (NNP Conduction)) (VP (VBZ is) (NP (NP (DT the) (NN transfer)) (PP (IN of) (NP (NP (JJ thermal) (NN energy)) (PP (IN between) (NP (NP (NNS particles)) (PP (IN of) (NP (NN matter))))))) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBG touching) (S (VP (VBN called))))))))) (. .)))