ACT Science

Read the legend on ACT Science

October 13, 2026 · 5 min read

Read the legend before the curve. Solid versus dashed, open versus filled, and the unit on the key are where Science hides the trick. Data passages as a set are in data representation.

Key, then axes

Axis labels and units come next, in axis labels and units. If two figures share a variable, still start with the legend on the one you were sent to, in the same variable on two figures.

Which figure the stem named is in which figure.

The bottom line

Legend first. A correct-looking curve with the wrong symbol is still wrong.

Start practicing

Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.

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