Jam and jelly are two totally different things.. Most americans call it all "jelly" because they don't know the difference, but "Jelly" doesn't contain fruit chunks and is often artificially flavored where as "jam" or "preserves" is more or less mashed up peices of fruit and often includes the seeds. Jam is called "jelly" due to ignorance. The english should then continue to call jelly, "jelly" and jam, "jam".
