( ( ( The force ) ( of magnetism ) ) ( ( decreases ( as ( ( the magnets ) ( are ( pulled apart ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN force)) (PP (IN of) (NP (NN magnetism)))) (VP (VBZ decreases) (SBAR (IN as) (S (NP (DT the) (NNS magnets)) (VP (VBP are) (VP (VBN pulled) (ADVP (RB apart))))))) (. .)))
The force of magnetism decreases as the magnets are pulled apart.
(ROOT (S (S (VP (VBG Increasing) (NP (NP (DT the) (NN distance)) (PP (IN between) (NP (DT the) (CD two) (NNS magnets)))))) (VP (MD will) (VP (VB cause) (NP (DT a) (NN decrease)) (PP (IN in) (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NP (NN attraction)) (PP (IN between) (NP (CD two) (NNS magnets))))))))) (. .)))
Increasing the distance between the two magnets will cause a decrease in the force of attraction between two magnets.