What is the easiest way to revise for a science exam?

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I'd say write some questions for yourself down on a piece of paper using your book's chapter headings, subheadings, etc.then write the answers below the question, memorize, cover, and try to recite it. You might want to go in different order to make sure you know the information thoroughly, not just by order on your paper.All I do is skim my notes a gazillion times, write answers to a bunch of questions, and do the thing I mentioned above, and I ace it. xD