sentences: finding and pie are different nitrogen & cold a pie daylight parrots into a pie ->  baking a cake produces a different substance  shade a mismatch will wreck fire & thunder a mismatch passes that mismatch to water ->  lighting a match causes the match to produce ashes  lighting a match causes the match to produce ashes & mismatch and fire are different inside ->  lighting a match produces a different substance  baking a cake produces a different substance & lighting a match produces a different substance ->  baking a cake and lighting a match both produces different substances  baking a cake and lighting a match both produces different substances & physical reach effect different australia to relation ->  lighting a match and baking a cake are both chemical reactions  lighting a match and baking a cake are both chemical reactions & physical observation effect physical static -> lighting a match and baking a cake are both chemical changes