What is the difference between a physical change and chemical change?

LOL! i remember doing this stuff a few years back in gr 7 :D well, we were given a list of reactions that were either chemical, or physical. what you said just basically made sense, though. chemical change: the substance changes color, a new substace is formed, heat/energy/light is given off phsyical change: temperature, blah blah blah... (i could have grabbed my notes, i think they're in my 9th grade backpack :D [no, i do not have a new backpack for each year...i've had my current one since 3rd grade XD], but it was in this huge one i used and i have all my science papers shoved in a folder in it. i have too much hmwrk right now as it is, but that's as much as i can tell you from memory. i know that may not be helpful enough, but that's what u get for not paying attention in class(i have no right saying this)! :D well, anyway, hope this helped enough. if this IS for school (what else could this possible be for? lol), then look in your science txtbook (even tho i don't think ure dumb enough not to look in their first, u prolli left it in ur locker or sumthing..) ANYHOW, i just remember that when an egg goes from raw to cooked, that's a chemical change, and when toast is ..toasted...thats a physical change, those 2 examples are burned in my brain. good luck on ur test or hmwrk or w/e!