Graphs. Tables. Experiments. Conflicting viewpoints. Zero biology, chemistry, or physics knowledge required.
ACT Science does NOT test biology, chemistry, physics, or earth science knowledge.
Every single answer is in the passage.
You are reading graphs and tables, not recalling facts.
Students who study science content for this section are wasting time.
Think of this section as "ACT Data Literacy."
The skill being tested is: can you read a figure, find the right row and column, and pick the answer the data actually supports?
That skill is entirely trainable — and it has nothing to do with knowing the periodic table.
Every ACT Science section has 6–7 passages drawn from these three formats. Knowing the format before you read tells you exactly what skill is being tested.
Graphs, tables, charts, and scatter plots. Questions ask you to read a specific value, identify a trend, or extrapolate just beyond the data. The answer is always directly in the figure.
Strategy: read axis labels and units before reading the question.
Describes one or more experiments — setup, variables, results, and sometimes a follow-up study. Questions test whether you understand experimental design: what's the independent variable, what's being controlled, and what would a new experiment show?
Strategy: identify the independent variable first.
Two (or three) scientists present competing explanations for the same phenomenon. Questions ask about each scientist's position, points of agreement, and which new evidence would strengthen or weaken each argument. This is the most text-heavy passage type.
Strategy: map each scientist's core claim before answering.
The ACT scores Science across three reporting categories. Each has a distinct skill that responds quickly to targeted practice.
Unit 1.1
Find specific values in a table. Read axis scales on line graphs, bar charts, and scatter plots. Identify the direction and shape of trends. No calculation required — just precise reading.
~44% of scoreUnit 1.2
Passages often include multiple figures. Questions ask you to combine information from two tables or a table and a graph. Match variables carefully — units and scales often differ.
~44% of scoreUnit 2.1
Identify independent variables (what's being changed), dependent variables (what's being measured), and controlled variables (what's held constant). Understand why a control group is included.
~25% of scoreUnit 2.2
Evaluate whether data supports, refutes, or is neutral to a stated hypothesis. Predict what would happen in a new experiment based on a trend shown in the existing data.
~25% of scoreUnit 3.1
Determine what a set of results shows — and what it doesn't. Distinguish between conclusions that are directly supported by the data and conclusions that go beyond it.
~31% of scoreUnit 3.2
Analyze competing scientific explanations. Identify which evidence would support or undermine each scientist's position. Find points of agreement and fundamental disagreements.
~31% of scoreData Representation passage. No login. Instant feedback — with trap analysis.
ACT Science · Data Representation · Table Reading
Context: The following table shows electrical resistance (Ω) of three metal wires at three temperatures.
| Metal | 20°C | 40°C | 60°C |
|---|---|---|---|
| Copper | 1.0 Ω | 1.3 Ω | 1.6 Ω |
| Aluminum | 1.5 Ω | 1.9 Ω | 2.3 Ω |
| Iron | 3.0 Ω | 3.7 Ω | 4.4 Ω |
Based on Table 1, which metal shows the greatest increase in resistance between 20°C and 60°C?
One passage. Two scientists. Opposing explanations. Here's the strategy that makes it manageable.
Read Scientist 1 — write one sentence summary
In your own words: "Scientist 1 thinks X because Y." Don't move on until you can say it without looking. This prevents you from confusing the two positions under time pressure.
Read Scientist 2 — identify the disagreement
What is the fundamental point of contention? Scientists will agree on the phenomenon but disagree on the cause, mechanism, or interpretation. Find the hinge point.
Answer "Scientist 1" questions first, then "Scientist 2"
Most questions are attributed to a specific scientist. Work all Scientist 1 questions together before switching to Scientist 2. This keeps you in one mindset and reduces attribution errors.
New evidence questions: ask "whose theory does this help?"
When a question presents a new finding, don't evaluate whether it's scientifically true — evaluate whether it supports or undermines each scientist's core claim. Evidence that eliminates Scientist 2's cause strengthens Scientist 1, and vice versa.
Conflicting Viewpoints is the most time-intensive passage — budget 8–9 minutes for it. See the pacing table below.
6 passages in 35 minutes. Not all passages deserve equal time — here's how to budget it.
| Passage Type | Passages | Time budget | Notes |
|---|---|---|---|
| Data Representation | 2–3 | ~5–6 min each | Fastest — answer is directly in figure |
| Research Summaries | 3 | ~6 min each | Need to understand experiment setup |
| Conflicting Viewpoints | 1 | 8–9 min | Text-heavy — budget extra time |
| Total | 6–7 | 35 minutes | No buffer — strict pacing required |
Order strategy: Most students do Conflicting Viewpoints last. It requires sustained reading and switching that's harder when you're fresh — and it's easier to come back to text than to a set of graphs you're mid-way through. But if you're strong at reading arguments, do it second when your focus peaks.
No account. No credit card. Start reading graphs and building data literacy in under a minute.