ACT: ACT Science: Data Interpretation and Experimental Reasoning

The ACT Science test is really a reasoning test. Passages present experiments, graphs, and tables, and questions ask you to interpret data rather than recall science facts. Expect three question types: data representation (reading graphs and tables), research summaries (understanding experimental design), and conflicting viewpoints (comparing hypotheses).

For graph questions, identify the axes, units, and trends. A common trap is confusing a direct relationship with an inverse one, or misreading a legend when multiple lines appear. For experimental design questions, distinguish the independent variable (what the researcher changes) from the dependent variable (what is measured), and identify controls. For conflicting viewpoints, focus on where the scientists disagree, not on background facts.

Worked example

If a table shows temperature rising while solubility rises, the relationship is direct. If a question asks what would happen at a higher temperature, extrapolate the trend rather than inventing new data.

Do not let unfamiliar terminology intimidate you; the passage usually defines what you need. Read the question first, then locate the relevant figure. Watch for "according to Figure 2" versus "according to the passage"-they point to different sources. Manage time by answering figure-based questions quickly and saving multi-step reasoning for later.