What the ACT Science Section Actually Measures

This section looks like a science test but behaves like a data-interpretation test. Each passage hands you tables, graphs, or a description of an experiment, and the numbers you need to answer almost every question are printed right there. A student with zero chemistry background can score as well as a student who has taken two years of it, because the passage itself supplies the facts. What separates scores is how fast and accurately someone can read a figure, not what they memorized.

Every question boils down to one of three jobs. Locate asks you to find a specific value in a table or graph. Compare asks you to weigh two or more values, trials, or variables against each other. Predict asks you to extend a pattern in the data to a point that was never tested or measured. Once you see a question as one of these three jobs, you know exactly where to look: the axis labels, the trend line, the units in a table header. The words around the figures mostly explain what was measured and why, which matters less than the shapes and numbers themselves.

This is why reading a passage word for word before touching the figures backfires. Close reading eats the clock without buying answers, since the questions test the data, not the prose. The stronger habit, covered next, is to skim the setup, go straight to the figures, and let each question pull you back to the text only when a question actually requires it.