Hi Evelyn16.
If your instructor returned your tests during the term, these, with the corrected answers of course, would make great study guides along with your review notes.

What did your instructor like to use to teach? Did he stress diagrams, charts, equations? Did he often show you charts with labels? Did he like to talk about famous scientists? You might get an unlabeled diagram or picture with blanks to fill in regarding some aspect that was stressed in your class. You might be asked about scientists you studied. Whatever the teacher stressed most, study that, or that format.

Usually, a review will be designed such that it covers or at least mentions most of what your exam will include. Be sure to study first of all, and most thoroughly, whatever was stressed during the review. Then study what was only briefly mentioned in the review. if you have more time and want to be though, study old tests, and diagrams. Whatever you do, don’t stress out too much! You bothered to ask, so you are conscientious about it. That makes me think you will do just fine!

Hope this helps.

Sorry that was supposed to say "If you have more time and want to be thorough" not "want to be though." I missed it when reviewing before posting. Again, good luck!