What most naturally follows?

How to choose between the sat or act test
Determine how quickly you can work through the exam.
The act has a science section, but the sat does not. If you have a strong foundation in biology, earth science, and physics, the act may be a better choice for you.
If you take the act, you will have to interpret charts, graphs, and understand scientific hypotheses. If you struggle in science or are not confident about your abilities, the sat is probably a better choice for you.