( Diffusion ( ( is ( ( the ( chemical process ) ) ( ( ( when molecules ) ( from ( a material ) ) ) ( move ( from ( ( ( ( an area ) ( of ( high concentration ) ) ) ( -LRB- ( ( where ( there ( are ( lots ( of molecules ) ) ) ) ) -RRB- ) ) ) ( to ( ( ( an area ) ( of ( low concentration ) ) ) ( -LRB- ( ( where ( there ( are ( fewer molecules ) ) ) ) -RRB- ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Diffusion)) (VP (VBZ is) (NP (NP (DT the) (JJ chemical) (NN process)) (SBAR (WHNP (WHNP (WHADVP (WRB when)) (NNS molecules)) (PP (IN from) (NP (DT a) (NN material)))) (S (VP (VBP move) (PP (IN from) (NP (NP (NP (DT an) (NN area)) (PP (IN of) (NP (JJ high) (NN concentration)))) (PRN (-LRB- -LRB-) (SBAR (WHADVP (WRB where)) (S (NP (EX there)) (VP (VBP are) (NP (NP (NNS lots)) (PP (IN of) (NP (NNS molecules))))))) (-RRB- -RRB-)) (PP (TO to) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (JJ low) (NN concentration))) (PRN (-LRB- -LRB-) (SBAR (WHADVP (WRB where)) (S (NP (EX there)) (VP (VBP are) (NP (JJR fewer) (NNS molecules))))) (-RRB- -RRB-))))))))))) (. .)))
Diffusion is the chemical process when molecules from a material move from an area of high concentration (where there are lots of molecules) to an area of low concentration (where there are fewer molecules).
(ROOT (S (NP (NNP Diffusion)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT the) (NN movement)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN from) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (NP (JJ high) (NN concentration)) (PP (TO to) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (JJ low) (NN concentration))))))))))))))) (. .)))