( ( ( ( ( ( Description ( of ( chemical ( change-burning paper ) ) ) ) , ) ( rusting iron ) ) , ) ( formation ( of ( sugars ( during ( ( photosynthesis ( , ( atom ( , ( molecule ( , ( bond ( , ( reactant ( , ( product ( , conservation ) ) ) ) ) ) ) ) ) ) ) ) ( of matter ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP Description)) (PP (IN of) (NP (JJ chemical) (JJ change-burning) (NN paper))) (, ,) (NP (JJ rusting) (NN iron)) (, ,) (NP (NP (NN formation)) (PP (IN of) (NP (NP (NNS sugars)) (PP (IN during) (NP (NP (NN photosynthesis) (, ,) (NN atom) (, ,) (NN molecule) (, ,) (NN bond) (, ,) (NN reactant) (, ,) (NN product) (, ,) (NN conservation)) (PP (IN of) (NP (NN matter)))))))) (. .)))
Description of chemical change-burning paper, rusting iron, formation of sugars during photosynthesis, atom, molecule,  bond, reactant, product, conservation of matter.
(ROOT (S (NP (NNS Atoms)) (VP (VBP make) (NP (NNS products)) (PP (IN by) (S (VP (VBG rearranging) (NP (PRP$ their) (NN chemical) (NNS bonds)) (PP (IN in) (NP (DT a) (NN reactant))))))) (. .)))