ATI TEAS Science Prep
TEAS Science Practice Test: What to Study and How to Practice
A good TEAS science practice test should do more than tell you a score. It should show whether you understand body systems, basic biology, chemistry, and scientific reasoning well enough to answer under time.
Quick answer: how to practice TEAS science
Start with a timed TEAS science practice test or focused science question set. Then review every missed question by topic: anatomy and physiology, biology, chemistry, or scientific reasoning. The review matters more than the raw score.
Science is where many pre-nursing students spend the most time, but more time does not automatically mean better practice. The key is to find the exact topic that cost you points, fix it, and test it again.
TEAS science question breakdown
The ATI TEAS science section has 50 total questions, including 44 scored questions, and gives you 60 minutes. That means you need both content knowledge and steady pacing.
| Science area | What it tests | How to practice |
|---|---|---|
| Human anatomy and physiology | Body systems, structure, function, homeostasis, and system interactions. | Study one system at a time, then answer mixed system questions. |
| Biology | Cells, genetics, macromolecules, reproduction, and basic life science. | Use diagrams and explain processes in your own words. |
| Chemistry | Atoms, bonds, reactions, pH, solutions, and chemical reasoning. | Practice definitions plus simple application questions. |
| Scientific reasoning | Experiments, variables, data, charts, and evidence-based conclusions. | Read the question like a mini lab report and identify the evidence. |
High-yield TEAS science topics to review
If your test date is close, prioritize science topics that connect to many questions instead of trying to reread every page in order.
Body systems
Cardiovascular, respiratory, endocrine, nervous, digestive, urinary, immune, reproductive, and musculoskeletal systems.
Cell biology
Organelles, membranes, transport, mitosis, meiosis, DNA, RNA, proteins, and basic genetics.
Chemistry basics
Atoms, ions, bonds, acids, bases, pH, water, reactions, enzymes, and macromolecules.
Data and reasoning
Independent variables, dependent variables, controls, graphs, trends, conclusions, and experimental design.
How to use a TEAS science practice test
A practice test is not the finish line. It is the map. The best score gains come from reviewing missed questions slowly enough to understand the pattern.
- Take the science set under timed conditions.
- Mark each miss as anatomy, physiology, biology, chemistry, or reasoning.
- Write the reason you missed it: content gap, reading error, rushed answer, or weak chart interpretation.
- Review the weak concept before taking another large set.
- Retest that same topic within 48 hours.
Ready to practice now? Open the NurseDive TEAS science question bank .
Original TEAS science practice examples
These are original examples to show the type of thinking to practice. Use them for reasoning, not memorization.
Anatomy and physiology
Which structure is the main site of gas exchange in the lungs?
Answer: Alveoli.
Why: Alveoli have thin walls and close capillary contact for oxygen and carbon dioxide diffusion.
Biology
Which organelle is most directly responsible for producing ATP?
Answer: Mitochondria.
Why: Mitochondria are the major site of cellular respiration and ATP production.
Scientific reasoning
A student changes fertilizer type and measures plant height after two weeks. What is the dependent variable?
Answer: Plant height.
Why: The dependent variable is the outcome being measured.
A seven-day TEAS science practice plan
If science is your weakest TEAS area, use a short cycle: test, repair, retest. The plan below keeps you moving without turning review into a fog.
Day 1: Diagnostic
Take a timed science set and group every miss by topic.
Day 2: Anatomy systems
Review the two body systems that cost you the most points.
Day 3: Biology
Drill cells, genetics, macromolecules, and basic life science.
Day 4: Chemistry
Review pH, bonds, reactions, solutions, and chemistry vocabulary.
Day 5: Scientific reasoning
Practice variables, graphs, controls, data trends, and conclusions.
Day 6: Mixed practice
Take a timed mixed science set and review rationales carefully.
Day 7: Retest
Retest the weakest topics and write a short final review list.
Practice TEAS science with NurseDive
NurseDive helps you move from broad science review to focused practice: anatomy, physiology, biology, chemistry, and scientific reasoning questions with clear review targets.
Science Question Bank
Practice focused TEAS science questions and review the topics behind missed answers.
TEAS Prep Track
Build your study plan across science, reading, math, and English.
Timed Review
Train pacing so you can think clearly inside the 60-minute science section.
Frequently asked questions
What is on the TEAS science section?
The TEAS science section covers human anatomy and physiology, biology, chemistry, and scientific reasoning.
How many questions are on the TEAS science section?
The TEAS science section has 50 total questions, including 44 scored questions, with 60 minutes of testing time.
What is the best way to practice TEAS science?
Take timed practice sets, review every missed rationale, group mistakes by topic, and retest weak areas within a few days.
Is anatomy and physiology the most important TEAS science topic?
Anatomy and physiology is very important, but biology, chemistry, and scientific reasoning also affect your science score.