Karen Berlin Ishii, One-to-One ACT Test Prep in NYC and via Skype
As others here have noted, the ACT Science test does not really test science knowledge. It is perfectly possible to get a very high score while knowing nothing – but being adept at analyzing charts and graphs and putting your finger on relevant information in the text to cross-reference with other data. In fact, every graph, every chart and every experiment on the test is one you'll never see again, so studying for the subject is not straight forward. Rather, acclimate yourself to interpreting data FAST: Allot yourself five minutes per passage, including bubbling in the answer sheet. Each passage has 2-3 totally easy questions and you don't want to miss them, getting stopped up on a hard one (which you are more likely to get wrong, anyway) early in the test. That said, there is still some basic knowledge that is very helpful. Be comfortable with chemical equations, genetics basics and terminology, ph, basic physics terms, scientific notation, animal kingdom hierarchy, and don't forget to use common sense: Water expands when it freezes, deserts are windier than rain forests, metal is a better conductor than wool, and so on.