ATI TEAS Science questions: what to know
ATI TEAS Science questions connect human anatomy and physiology with biology, chemistry, and scientific reasoning. Use this 50-question practice test to check both what you know and how you apply it to a described process or investigation.
For an overview of TEAS science preparation, visit TeasGurus. This page focuses on the skills and practice methods for the Science section.
What topics are covered in TEAS Science?
ATI lists 50 questions in this section, including 6 unscored items, with a 60-minute time limit. The table shows the published distribution of the 44 scored items. View ATI’s section specifications.
| Content area | Scored items | Skills to review |
|---|---|---|
| Anatomy & physiology | 18 | Relate body structures to their functions and understand how systems maintain internal conditions. |
| Biology | 9 | Review cells, genetic information, inheritance, biological molecules, and cellular processes. |
| Chemistry | 8 | Review matter, atoms, chemical relationships, reactions, and solutions. |
| Scientific reasoning | 9 | Evaluate hypotheses, identify variables, interpret observations, and judge whether evidence supports a conclusion. |
The unscored items are additional to this table. In the practice test on this page, every question contributes to your practice score.
Practicing anatomy & physiology
Explain the role of an organ or structure and predict how a change in its function affects a process.
Practicing biology
Distinguish an allele combination from an observable trait and connect a cell structure with its function.
Practicing chemistry
Use the information in a question to distinguish a physical change from a chemical one or compare properties of substances.
Practicing scientific reasoning
Separate what an investigation measured from what its results can legitimately establish.
How should you approach TEAS Science questions?
First determine whether the item asks for a fact, an explanation of a process, or an interpretation of evidence. For a process, trace the sequence rather than selecting an option simply because it contains a familiar term.
In anatomy and physiology, connect structure to function. In genetics, track the allele symbols carefully because uppercase and lowercase letters can represent different alleles. In chemistry, check the stated conditions and units before interpreting a comparison.
- Read all answer choices before selecting the most familiar scientific term.
- Separate observations from proposed explanations.
- Use the experimental conditions given rather than inventing extra information.
Variables and evidence: an experiment example
A student grows identical seedlings under different daily light durations while keeping soil, water, and temperature the same. The student measures plant height after two weeks. Light duration is the independent variable because it is deliberately changed; height is the dependent variable because it is measured.
If plants in one group grow taller, the results concern growth under those tested conditions. They do not establish that the same light duration is best for every plant species. A conclusion should stay within the evidence the investigation provides.
How can you study science beyond memorizing definitions?
Build short cause-and-effect explanations. Instead of memorizing only that the lungs exchange gases, explain how air reaches the gas-exchange surfaces and how those surfaces relate to the blood. Then ask what would change if one part of that process were impaired.
For each concept, connect a structure or variable to a function, a mechanism, and a likely consequence. A diagram or simple flow chart can expose a missing step in your understanding more clearly than another list of terms.
- Compare closely related concepts, such as genotype and phenotype.
- Describe the purpose of a control group and the conditions it shares with an experimental group.
- Explain why the incorrect options do not fit the question, not just why the correct one does.
What should you study after a science practice test?
Use the topic breakdown to find a starting point, then examine the individual errors. A missed anatomy item may reflect a vocabulary gap, confusion between structures, or difficulty predicting a consequence; these need different kinds of review.
Write one corrective explanation for each missed concept and test it with a new example. Once you can explain the mechanism without notes, return to mixed practice so the question itself, rather than the chapter heading, tells you which concept to apply.
How does this Science practice test work?
This set contains 50 single-answer questions. Choose timed mode for a 60-minute session, or untimed mode to work at your own pace. You can change answers, navigate between questions, and flag items before submitting.
After submission, the player shows your percentage correct, results by topic, and explanations. Each fully correct response earns one point; unanswered questions and incomplete multiple-answer responses earn zero. Your answers are kept only for the current session, so refreshing the page clears them.
Use the practice percentage to identify what to review. It is not an official ATI score: ATI adjusts its total and content-area scores for differences between exam forms. Read how ATI scores the TEAS.
ATI TEAS 7 can also use fill-in-the-blank and hotspot items. The formats available in this practice set do not represent every format you may encounter on test day.
TEAS Science questions and answers
Which science topic has the most scored TEAS questions?
Human anatomy and physiology has the largest published allocation within Science: 18 of its 44 scored items. Biology, chemistry, and scientific reasoning still need separate preparation.
Is memorizing body-system names enough?
No. Naming a structure is different from explaining its role. Practice connecting structures with functions and predicting how a change affects the system described in a question.
What is the difference between a hypothesis and a conclusion?
A hypothesis is a testable proposed explanation or prediction. A conclusion interprets the findings after the investigation and should reflect what its evidence supports.
Do these science questions require diagrams?
This practice set uses self-contained text questions. Any information needed to answer is supplied in the item; there are no missing image references.
How can I avoid mixing up scientific terms?
Compare related terms side by side, define their differences, and create an example of each. Then explain which feature in a question distinguishes the correct concept from the distractors.
What score do I need for admission?
Each program sets its own TEAS score requirements. Check the school’s current admissions policy rather than treating a practice-test percentage as a universal passing score. ATI’s guidance on required scores.
Will I receive new questions when I restart?
No. This is a fixed practice set. A new attempt clears your responses but uses the same questions. Review the reasoning and use other practice material to check whether you can apply a skill to an unfamiliar problem.
Where should you practice next?
Build on this subject with a related skill, or return to the TeasGurus TEAS preparation overview to explore all four sections.
- Review measurement and data in MathStrengthen the numerical skills used in scientific interpretation.
- Practice evaluating written evidenceWork on conclusions, supporting details, and the limits of a claim.
Exam format checked against ATI’s published guidance on November 13, 2026. Study strategies and examples are provided by TeasGurus.