Understanding the Timing and Structure of the ACT Science Section in 2025

Introduction: The Importance of Knowing ACT Science Section Timing

For students preparing for college admissions, the ACT remains a crucial standardized test. Understanding its structure, especially the timing of each section, is essential for effective preparation and maximizing scores. This article provides a comprehensive breakdown of how long the ACT Science section lasts, recent changes to the test format, actionable strategies for pacing, and guidance on accessing official resources.

Current ACT Science Section Length: Official Timing and Format

As of 2025 , the timing and format of the ACT Science section have undergone significant changes. Historically, the Science section was a mandatory component of the ACT, lasting 35 minutes and containing 40 questions [1] . Students had approximately 53 seconds per question, requiring efficient pacing and quick reading skills.

However, starting in April 2025, the ACT test format changed to make the Science section optional . Students who opt to take Science still face 40 questions , but the time allotted may vary depending on the version of the test and the chosen options:

Traditional Format (pre-April 2025): 35 minutes for 40 questions [1] [2] .
Enhanced ACT (April 2025 and later): Science section becomes optional, with timing ranging from 35 to 40 minutes for 40 questions depending on specific test settings [3] [4] .

For most test administrations in 2025, expect the Science section to be 35 minutes with 40 questions , unless local policies, digital formats, or specific accommodations provide slightly more time [3] .

Section Structure: What to Expect in ACT Science

The ACT Science section is modeled more closely on reading comprehension than traditional science exams. The section presents seven passages , each accompanied by charts, graphs, and experimental summaries, followed by four to seven questions per passage [1] . Students must analyze data, interpret results, and draw conclusions based on provided information rather than recall scientific facts.

Key passage types include:

Data Representation: Graphs, tables, and visual information.
Research Summaries: Experimental setups and results.
Conflicting Viewpoints: Differing scientific perspectives or hypotheses.

Success requires rapid reading, interpreting complex data, and answering multiple-choice questions within a strict time limit. The high question density means time management is critical.

Recent Changes: Optional Science Section and Composite Score Updates

In April 2025, the ACT introduced a major update. The Science section became optional , and the composite score calculation shifted to focus on English, Math, and Reading. Students who opt to take Science receive a separate score, and those who complete both Math and Science are awarded a STEM score [5] .

Key changes include:

Test Length Reduction: The total test time dropped from up to 195 minutes to about 125 minutes for the core test, or 165 minutes if Science is added [3] .
Composite Score Calculation: Only English, Math, and Reading are averaged for the primary composite score. Science and Writing scores are reported separately [5] .

These updates offer students more flexibility and allow tailored test-taking strategies, such as skipping Science if it does not align with their college goals or academic strengths.

Time Management Strategies for ACT Science

Given the strict time constraints, effective pacing is essential. Students typically have about 52-53 seconds per question [1] [2] . To maximize performance:

Practice Timed Sections: Regularly complete full Science sections under test conditions to build speed and confidence.
Prioritize Easier Questions: Move quickly through straightforward questions, returning to complex items if time permits.
Skim Passages: Focus on key data, graphs, and experimental results rather than reading every word.
Use Process of Elimination: Remove obviously incorrect answers to improve odds when guessing.

Test-takers who struggle with pacing may benefit from digital practice tools, which simulate the real exam environment and help develop rapid comprehension skills.

Accessing Official Resources and Practice Materials

To ensure up-to-date preparation, students should utilize official ACT resources and reputable test prep providers. The ACT’s own website offers test dates, registration, sample questions, and score reporting information. For official guidance:

Visit the official ACT website by searching for “ACT test” or “ACT Science section” for detailed timing, structure, and updates.
Consult major test prep organizations, such as Princeton Review and PrepScholar , for tips, sample questions, and strategic advice [4] [1] .
For recent changes, review educator guides and official announcements from ACT Education Corp [5] .

If you need accommodations (extended time, alternate formats), contact your school counselor or the ACT directly and request guidance on eligibility and application procedures.

For registration, use the official ACT registration portal. Avoid third-party websites or unofficial sources, as these may not provide accurate or current information.

Preparing for the Science Section: Implementation Steps

Effective ACT Science preparation involves several steps:

Identify Your Test Format: Confirm whether your upcoming ACT includes the Science section as mandatory or optional. If optional, determine whether taking it benefits your college applications.
Review Official Guidelines: Check the ACT website for the latest updates on timing, question formats, and scoring.
Develop a Study Plan: Allocate regular time for timed practice, focusing on interpreting charts, reading experimental summaries, and analyzing conflicting viewpoints.
Practice with Official Materials: Use ACT sample questions and full-length practice tests from reputable sources.
Monitor Your Pace: Use a stopwatch during practice to ensure you can complete 40 questions in 35 minutes.
Seek Guidance as Needed: If you encounter challenges, consider working with a tutor or joining a test prep program.

Examples and Case Studies

Example 1: A student preparing for the April 2025 ACT confirmed through the official ACT site that the Science section was optional. By focusing on their strengths in English and Math, they chose not to take Science, saving time and reducing test-day stress.

Example 2: Another student aiming for a STEM major opted to include the Science section. By practicing with timed materials from Princeton Review, they improved their pacing and achieved a competitive STEM score, supporting their college application.

Alternative Approach: For students who struggle with science content, focusing on Reading and Math can be a viable strategy, as composite scores now rely on those sections. Always confirm with target colleges whether the Science score is required or recommended.

Key Takeaways and Next Steps

Understanding the timing and structure of the ACT Science section is essential for effective preparation. With recent changes making Science optional, students have greater flexibility to tailor their test experience. Always consult official resources for the latest updates, and use reputable practice materials to hone your skills. For further questions or personalized guidance, contact your school counselor or refer to the official ACT website for support.

References

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