ACT Science: What it Tests, Whether to Take it, and How to Score 30+
ACT Science changed more in 2025 than in the previous two decades. It is now optional. It no longer affects your composite score.
ACT Science section: what it tests, how it's scored, and whether to take it
The ACT Science section is optional. That is the most important thing to understand about it as you go into 2025 and beyond.
Since the Enhanced ACT launched, Science no longer counts toward your composite score. Students choose at registration whether to add it. If you do, you receive a standalone Science score (1-36) and a STEM score combining Math and Science. If you skip it, your composite is calculated from English, Math, and Reading only, and nothing on your score report is missing.
That makes the first question every student faces: Should I take ACT Science at all?
The second question, for those who decide yes: how do I score well on a section that looks like science class but barely tests science knowledge?
NAT's ACT tutors help with both. 92% of NAT students improve their scores. Our tutors include Kurtis, who scored a 36 on the ACT and 1570 on the SAT, and Uju, who scored a 35 ACT and 1590 SAT at Northwestern. If you want expert guidance from the start, one-on-one ACT tutoring at NAT is built around your specific score goals, not a generic curriculum.
Why 92% of NAT students improve their ACT scores
NAT was founded by students and alumni from Harvard, MIT, Stanford, Princeton, and Oxford who saw the same problem everywhere: finding a genuinely excellent tutor was harder than it should be. Not just someone who knew the material, but someone who could teach it, build a relationship, and be accountable for results.
Every tutor on NAT's platform is a current student or graduate of an Ivy League or top-20 university. For ACT prep specifically, that means your child works with someone who scored in the 99th percentile on the same test and knows exactly what the Science section asks for at each score level.
No long-term contracts. If the tutor is not the right fit, we change it for free. You can browse NAT's ACT tutors by specialty and credential before booking anything.
Your grades are now our responsibility.
What is the ACT Science section?
The ACT Science section is a 40-question, 40-minute optional test that measures scientific reasoning and data interpretation. It is not a content test. Students do not need to recall biology formulas, periodic table data, or chemistry equations to answer the questions.
The section presents six passages drawn from biology, chemistry, physics, and earth/space science. Each passage comes with graphs, tables, diagrams, or written experiment descriptions. The questions ask students to read and interpret that information accurately and quickly. A student who has never taken AP Chemistry can score a 32 on ACT Science if they are an efficient reader of scientific data.
Since the Enhanced ACT launched in 2025, Science no longer contributes to the ACT composite. It is reported separately on the 1-36 scale, and students who take it receive a STEM score combining Math and Science. For a full picture of how the Enhanced ACT changed the overall scoring structure, the ACT score range guide breaks down every number on the score report.
How the ACT Science section changed in 2025
For decades, Science was one of four required ACT sections. It counted equally with English, Math, and Reading toward the composite. That changed.
Starting with digital administrations in spring 2025 and extending to all test formats by September 2025, ACT Inc. redesigned the exam. Science became optional. Students who skip it receive a complete composite from English, Math, and Reading. Students who opt in pay an additional registration fee and receive a Science score and STEM composite on top.
The section also got a timing upgrade. It ran 35 minutes under the old format. Under the Enhanced ACT, it runs 40 minutes. That gives students about one full minute per question instead of 52 seconds, which helps pacing meaningfully.
For a thorough breakdown of what the 2025 changes mean for score strategy and superscores, see the guide to what changed with ACT Science in 2025.
Here is how the current scoring structure looks:
One thing worth noting: any source that still describes ACT Science as a required composite section is out of date. The ACT's official section structure page reflects the current Enhanced ACT format.
What does ACT Science actually test?
ACT Science tests one core skill: reading and interpreting scientific information quickly and accurately.
That is it. Students who walk into the section expecting to recall AP Chemistry content are usually surprised to find that the passage provides everything they need. The test does not check whether you memorized the second law of thermodynamics. It checks whether you can read a table or graph that references it and answer a question about it correctly within about 60 seconds
The three formal skill areas the section measures are:
Interpretation of Data: Reading graphs, tables, and diagrams. Identifying trends, ranges, and values. Comparing data across figures. This is where most questions live.
Scientific Investigation: Understanding how experiments are designed. Identifying variables, controls, and methodology. Predicting what would happen if a variable changed.
Evaluation of Models, Inferences, and Experimental Results: Assessing which conclusion a dataset supports. Identifying assumptions and limitations. Understanding what the data does and does not prove.
Under the Enhanced ACT, a fourth skill area was added: Engineering and Design Thinking. These questions appear primarily in Research Summaries passages and ask whether a proposed design achieves its intended goal. It is a reasoning task, not a recall task.
Students who read carefully, stay comfortable with charts, and work quickly tend to do better on ACT Science than they expect. If you are still deciding between the ACT and the SAT and want to understand how Science factors into that choice, the SAT vs ACT comparison covers the key differences, including which student profile each test tends to reward. For STEM-focused students specifically, the Digital SAT vs ACT for STEM guide walks through the section-by-section tradeoffs.
The 3 types of ACT Science passages
The Science section uses three passage formats. Knowing all three before test day matters.
Data Representation passages are typically the fastest to answer. The information is in front of you. Research Summaries require a bit more reading but follow predictable patterns once a student has practiced them. Conflicting Viewpoints is where most students lose the most points and the most time.
On a typical test, you will see roughly three Data Representation passages, two Research Summaries passages, and one Conflicting Viewpoints passage. The passage order is not fixed, so scanning the section briefly before starting helps students decide where to begin.
Kurtis is one of the few tutors in the country who has scored a 36 on the ACT and a 1570 on the SAT. Over 5 years working. Conflicting Viewpoints has come up in nearly every Science session. His take:
The 4-signal framework From NAT Tutors
Virtually no prep guide or competitor page helps students make this decision in a structured way. Since Science became optional in 2025, it is one of the first questions NAT tutors address in an initial strategy session. Here is the framework they use.
Signal 1: Your target program or school requests a Science score. Some colleges, especially those with competitive engineering, pre-med, biology, and natural sciences programs, still request or recommend ACT Science scores. This varies by institution and changes year to year. Check each school's admissions requirements page before registering, not after. If your top school lists a Science score recommendation, opt in.
Signal 2: The student scores well on science-style tasks in practice. Students who are comfortable reading graphs and data tables, even outside of formal science classes, tend to perform well on ACT Science with targeted practice. If a diagnostic practice test shows a Science score above 28, the investment to push it higher is typically smaller than expected.
Signal 3: A high Science score strengthens a STEM narrative. A 34 Science score combined with a strong Math section creates a STEM composite that tells a clear story to engineering and pre-med admissions teams. For students applying to selective STEM programs, a STEM score in the 90th percentile or above is a real differentiator.
Signal 4: The student can absorb the extra 40 minutes on test day. ACT Science adds 40 minutes to an already demanding day. For students who experience meaningful fatigue over long tests, opting out of Science may preserve performance on the three core sections. A fatigued composite score is a bigger loss than a missing optional score.
NAT tutors weigh all four signals together, not in isolation. If you are unsure where your child falls, a free ACT strategy consultation runs about 20 minutes and maps the decision to their specific target schools and current baseline.
How is ACT Science scored?
The ACT Science section is scored on the same 1-36 scale as the other sections. Your raw score (correct answers out of 40) converts to a scaled score through equating. ACT Inc. adjusts the curve slightly per test form so that a 30 on one administration means the same as a 30 on another.
There is no penalty for wrong answers. Every student should answer all 40 questions, even if some are guesses. A blank answer earns zero points. A guess earns zero or one point, never negative.
If you take the Science section, three numbers appear on your score report: your Science section score (1-36), your STEM score (Math + Science averaged), and your national percentile for each. Admissions teams at STEM programs can see all three.
To estimate your composite and see where your section scores stand relative to college tiers, the ACT Score Calculator at NAT runs the conversion in real time. For context on what scores are needed for a perfect composite, the highest ACT score breakdown explains exactly how the Enhanced ACT's three-section composite changes the path to 36.
Under the Enhanced ACT, Science does not affect the composite at all. A student who earns a 34 composite but scores a 22 on the optional Science section still has a composite of 34. The composite stays intact.
Common mistakes students make on ACT Science
Most ACT Science struggles come from a small number of fixable problems.
Treating it like a content test. Students who spend hours reviewing biology or chemistry for ACT Science are almost always wasting time. The passage provides everything needed to answer the questions. The actual skill being tested is locating information quickly, not recalling it.
Reading every word of every passage. This approach is a time trap. The passage provides much more information than any single question will ask for. Strong test-takers skim to understand the passage structure, then read carefully only around what each question references.
Letting Conflicting Viewpoints slow everything down. Many students spend 12-15 minutes on one passage and then rush through the rest. The fix is a consistent pre-reading approach, not reading faster. Map each viewpoint before touching a question.
Skipping questions. There is no penalty for wrong answers, so leaving any question blank is the wrong call. Mark uncertain questions, keep moving, and come back at the end to fill every blank with your best guess.
Using outdated prep materials. Many prep books still describe the old 35-minute, seven-passage format. The Enhanced ACT runs 40 minutes across six operational passages. Practicing under the wrong conditions builds bad habits. The ACT tutoring resource hub at NAT links to current, verified practice materials organized by section.
Uju has tutored 200+ students in ACT prep over 6 years at NAT. Students regularly describe her Science sessions as "the first time the section actually clicked." The core misconception she keeps encountering is that almost every student I start with thinks they need to know more science.
Proven strategies to improve your ACT Science score
These are the approaches NAT tutors use most consistently with students targeting 30 or above.
Map each passage before answering questions. Give yourself 30-45 seconds per passage to identify what each figure shows and what the key variables are. Brief margin notes on paper tests help. This prevents the back-and-forth re-reading that kills pacing more than any other single habit.
Use process of elimination on Conflicting Viewpoints. On Conflicting Viewpoints questions, two of the four answer choices almost always contradict facts stated directly in the passage. Eliminating obviously wrong answers first makes the final choice faster and more confident.
Read scientific figures regularly outside of prep sessions. The skill of reading graphs, tables, and data summaries transfers quickly with practice. Students who spend 10 minutes daily reading charts, whether from science news or data journalism, see measurable improvement in their baseline speed within two to three weeks.
Prioritize your fastest passage type first. For most students, that is Data Representation. Start there and save time for the slower Conflicting Viewpoints passage at the end.
Time every practice session at exactly 40 minutes. Students who practice untimed consistently struggle on test day when the clock matters. The 40-minute limit is the real challenge. If you are using pre-2025 practice materials, the detailed 2025 format guide explains how to adjust old practice tests to simulate current conditions accurately.
For students targeting 32 or above, review habits drive the marginal improvements. Analyzing every wrong answer after a practice set, not just checking whether you got it right, separates students who plateau at 28 from those who reach 33+.
How NAT's ACT Science tutors help
One-on-one ACT Science tutoring at NAT starts with a diagnostic. In the first session, the tutor identifies exactly which question types and passage formats are costing the student points. That shapes everything that follows.
Rather than working through prep book chapters in sequence, NAT tutors build sessions around the student's specific error patterns. A student struggling with Research Summaries gets a different plan than a student losing time on Conflicting Viewpoints. Sessions are flexible and scheduled around the student's calendar.
Progress is tracked across sessions and reported to parents with context, not just scores. If the tutor is not the right match, NAT finds a replacement with no cost and no friction.
Ask Isaiah about what actually moves ACT Science scores, and he will tell you the same thing every time. With a 36 ACT and 9+ years working with 500+ students on test prep, he has seen the same pattern play out across students at every score level:
Benefits of one-on-one ACT Science tutoring
Self-study has a real ceiling on ACT Science. The core problem is that most students cannot accurately identify their error patterns. They see a wrong answer, read the explanation, think they understand, and then make the same mistake again. The feedback loop is broken.
A tutor who has scored 34+ on ACT Science and worked with dozens of students can diagnose quickly. They see the gap between what a student believes they are doing and what the test is actually revealing. That gap is where most score improvements live.
Specific things students report after working with NAT on ACT Science include faster passage-mapping habits, consistent timing across all six passage types, and confidence on Conflicting Viewpoints passages that most students dread. Students also report fewer surprises on test day because their practice conditions matched the actual format.
You can browse NAT's ACT tutors filtered by specialty or start with a free consultation to match with a tutor who fits your timeline and score targets. Our tutors can also tell you honestly whether taking the optional Science section makes sense for your application.
Why choose North American Tutors for ACT prep
NAT's ACT tutors are not generalist tutors who cover every subject. They are specialists who scored in the 99th percentile on the ACT and tutored students through the same challenges your child is facing now.
Kurtis scored a 36 ACT and 1570 SAT. Uju scored a 35 ACT and 1590 SAT at Northwestern. These are people who have done what your child is trying to do, at the highest possible level, and who have since spent years helping students repeat that outcome.
The 92% improvement rate at NAT is not a marketing claim. It reflects a methodology that starts with diagnostic accuracy rather than generic prep. We identify the specific error patterns, address them in sequence, and confirm improvement through practice data before test day.
No long-term contracts. No rigid packages. If you want to understand how ACT prep fits into the bigger picture of college admissions test selection, the SAT vs ACT guide walks through the comparison with section-level data. For free study materials organized by ACT section, the ACT tutoring resource hub is the best place to start.
FAQ’s
Frequently Asked Questions
Ready to improve your ACT Science score?
The ACT Science section is learnable. It tests a specific set of reasoning skills that improve with the right kind of practice. The students who struggle most are not usually struggling because they lack science knowledge. They are struggling because they have not practiced reading scientific data under timed conditions, or because they spend too long on Conflicting Viewpoints passages and run out of time.
NAT's tutors have seen both problems before. They know what to fix and how to fix it.
Start with a free strategy session. We will review your current ACT baseline, your target schools, and your timeline. Then we will give you an honest answer: does taking ACT Science make sense for your application, and what does a realistic prep plan actually look like?
Your grades are now our responsibility.