Interpret data
Practice reading tables, graphs, trends, variables, and relationships. Start by identifying what each axis, column, or measurement represents before comparing values.
Understand investigations
Review experimental design, independent and dependent variables, controls, procedures, and how a change in the setup could affect the result.
Evaluate claims with evidence
Use the information provided in the passage, figure, or experiment to decide which claim is supported. Avoid choosing an answer based only on outside science knowledge when the question asks about the given data.
By the Numbers
The ACT Science question bank on this site includes 68 original questions, focused on data representation, research summaries, and evaluating conflicting viewpoints.
Worked Example
Data: A student measured seed germination at different soil temperatures.
| Soil Temp (°C) | Seeds Germinated (of 50) |
| 10 | 8 |
| 15 | 22 |
| 20 | 41 |
| 25 | 47 |
| 30 | 45 |
Question: Based on the data, as soil temperature increased from 10°C to 25°C, the number of seeds germinated:
- A) decreased steadily
- B) increased steadily
- C) stayed the same
- D) increased, then decreased
Show answer and explanation
Correct answer: B) increased steadily. From 10°C to 25°C the germination count rises at every step: 8, then 22, then 41, then 47 — a steady increase across that range. (The count does dip slightly at 30°C, but that point falls outside the 10–25°C range the question asks about.)
Related Practice
Frequently Asked Questions
Is ACT Science practice free?
Yes. You can start the ACT Science practice tools without a paid subscription.
What skills are included?
Practice focuses on data interpretation, scientific investigation, experiments, and evaluating claims with evidence.
Is ACT Science required for every student?
ACT policies can change, so use the current official ACT information for your own testing situation. This page provides independent practice only.
How many ACT Science practice questions are on this site?
The ACT Science bank includes 68 original questions, focused on interpreting data, experiments, and evaluating claims with evidence.
What does an ACT Science data-interpretation question look like?
See the worked example above, which shows how to read a data table and identify a trend across a specific range of values.