It is NOT enough! You need to understand vaporization in a way that isn't even in the study guide. Basically you just really need to "understand" everything in order to answer the questions correctly. All of the answers on some questions seem like they could be correct. The science section was ridiculous, but take both of the practice assessments from the ATI Testing website and you should be okay. There was a lot of Chemistry on my test. Also, watch YouTube videos on chemical bonding, meiosis and mitosis, etc.