( Diffusion ( ( is ( ( ( ( the ( random ( , ( thermal movement ) ) ) ) ( of ( molecules ( in solution ) ) ) ) ( -LRB- ( ( Brownian motion ) -RRB- ) ) ) ( that ( ( leads ( to ( ( the ( net movement ) ) ( of ( molecules ( from ( ( an area ) ( of ( ( higher concentration ) ( to ( a ( lower concentration ) ) ) ) ) ) ) ) ) ) ) ) ( until ( equilibrium ( is reached ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Diffusion)) (VP (VBZ is) (NP (NP (NP (DT the) (JJ random) (, ,) (JJ thermal) (NN movement)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN in) (NP (NN solution)))))) (PRN (-LRB- -LRB-) (NP (NNP Brownian) (NN motion)) (-RRB- -RRB-)) (SBAR (WHNP (WDT that)) (S (VP (VBZ leads) (PP (TO to) (NP (NP (DT the) (JJ net) (NN movement)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN from) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (NP (JJR higher) (NN concentration)) (PP (TO to) (NP (DT a) (JJR lower) (NN concentration))))))))))) (SBAR (IN until) (S (NP (NN equilibrium)) (VP (VBZ is) (VP (VBN reached)))))))))) (. .)))
Diffusion is the random, thermal movement of molecules in solution (Brownian motion) that leads to the net movement of molecules from an area of higher concentration to a lower concentration until equilibrium is reached.
(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))))))))))))))) (. .)))