( Diffusion ( ( is ( ( the moving ) ( of ( particles ( from ( areas ( of ( ( high concentration ) ( to ( areas ( of ( low concentration ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Diffusion)) (VP (VBZ is) (NP (NP (DT the) (NN moving)) (PP (IN of) (NP (NP (NNS particles)) (PP (IN from) (NP (NP (NNS areas)) (PP (IN of) (NP (NP (JJ high) (NN concentration)) (PP (TO to) (NP (NP (NNS areas)) (PP (IN of) (NP (JJ low) (NN concentration))))))))))))) (. .)))
Diffusion is the moving of particles from areas of high concentration to areas of low concentration.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT the) (NN movement)) (PP (IN of) (NP (DT a) (NN substance)))) (PP (IN from) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (NP (DT a) (JJR higher) (NN amount)) (PP (IN toward) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (JJR lower) (NN amount) (NN diffusion)))))))))) (. .)))