Differences betwen jelly, jam and marmalade

Some people tend to confuse the names of jam, jelly and marmalade. Although they can seem the same food they have some differences between them. For instance, the first one, jam, is a thick, fruity spread made with the whole or cut fruits and sugar. Jelly is a clearer and more sparkling spread because it is made only with the juice of the fruit and sugar. Finally, marmalade, which is frequently confused with jam, is made with bitter Spanish oranges, specifically Sevillian oranges!