According to A+ Tutoring, a test prep company with a solid reputation, the science section doesn’t ask detailed information about various disciplines in the science curriculum. More questions are directed toward an understanding of the scientific method.
Do you know what a hypothesis is? Its the question an experiment is designed to answer
Can you describe the steps used in setting up the experiment?
How do you observe the results and interpret those results?
What conclusions do the data lead to?
General knowledge about science and its various disciplines is a good thing but understanding how the material in your science class was derived (experimentation!) will go a long way to succeeding on this section of the ACT!