How many science questions are on the TEAS 7?

50 questions in 60 minutes. About half cover human anatomy & physiology.

What body systems are tested on TEAS science?

All major systems: cardiovascular, respiratory, nervous, endocrine, gastrointestinal, immune, integumentary, muscular, skeletal, reproductive, and urinary. Cardiovascular and respiratory appear most frequently.

How much chemistry is on the TEAS?

Roughly 9 questions — about 18% of the section. Topics include atomic structure, the periodic table, reactions, solutions, and acids/bases.

Why is TEAS science the hardest section?

The breadth (4 sub-areas), the heavy anatomy load, and the pacing (72 seconds per item) combine to make Science the lowest-scoring section for most test-takers.

What's the best way to memorize anatomy for the TEAS?

Active recall with diagrams. Cover the labels, redraw the structure, then check. Repeat for each body system over a 6-week cycle.

Science Pillar

TEAS Science Practice Questions: 600+ Anatomy, Biology & Chemistry Items

Science is the longest and most failed section of the TEAS 7 — 50 questions in 60 minutes, with anatomy & physiology making up roughly half of all items. This page gives you targeted practice for every science sub-area.

Last updated September 8, 2026 · Reviewed by TEAS Academy

50 questions

60 minutes

~50% A&P

All body systems

TEAS 7 science blueprint

Human Anatomy & Physiology (~24 questions) — cardiovascular, respiratory, neurological, endocrine, gastrointestinal, immune, integumentary, muscular, skeletal, reproductive, urinary systems.
Biology (~9 questions) — cells, cellular respiration, photosynthesis, DNA, genetics, macromolecules.
Chemistry (~9 questions) — atomic structure, periodic table, chemical reactions, solutions, acids/bases.
Scientific Reasoning (~5 questions) — experimental design, variables, measurement.
~3 unscored pretest items.

Start with the free Anatomy & Physiology practice test, then continue into the full Science question bank.

Practice question 1 — Cardiovascular

The mitral valve is located between which two chambers of the heart?

A. Right atrium and right ventricle
B. Left atrium and left ventricle
C. Right ventricle and pulmonary artery
D. Left ventricle and aorta

Correct answer: B. Left atrium and left ventricle

Why: The mitral (bicuspid) valve sits between the left atrium and left ventricle. The tricuspid valve sits between the right atrium and right ventricle.

Featured TEAS science questions with full explanations

Each question below opens a dedicated page with the full rationale, distractor analysis, study tip, and related practice — exactly what Google indexes for long-tail TEAS searches:

See all 50 explained TEAS Science questions →

Practice question 2 — Respiratory

Gas exchange in the lungs occurs primarily in which structure?

A. Trachea
B. Bronchi
C. Bronchioles
D. Alveoli

Correct answer: D. Alveoli

Why: Alveoli are tiny air sacs surrounded by capillaries — their thin walls allow O₂ to diffuse into the blood and CO₂ to diffuse out. The trachea, bronchi, and bronchioles are conducting passages, not exchange surfaces.

Practice question 3 — Biology (genetics)

Two parents with genotype Aa × Aa have a child. What is the probability the child is homozygous recessive (aa)?

A. 0%
B. 25%
C. 50%
D. 75%

Correct answer: B. 25%

Why: A Punnett square of Aa × Aa yields 1 AA : 2 Aa : 1 aa. Probability of aa = 1/4 = 25%.

Practice question 4 — Chemistry

A solution with a pH of 3 is best described as:

A. Strongly basic
B. Weakly basic
C. Neutral
D. Strongly acidic

Correct answer: D. Strongly acidic

Why: The pH scale runs 0–14. pH below 7 is acidic; pH = 3 is two orders of magnitude more acidic than pH = 5. Strong acids fall in the 0–3 range.

How to study TEAS science efficiently

Front-load anatomy & physiology — it accounts for ~50% of items.
Work through one body system per week using our hub pages: cardio, respiratory, nervous, endocrine.
Use the Ultimate TEAS 7 Science Cheat Sheet as your single source of high-yield facts.
Finish each week with 30 timed science questions and full rationale review.
Final week: complete the science question bank under realistic timing.

Frequently Asked Questions

Sources & references

This page is maintained by the TEASAcademy Editorial Team — ATI TEAS 7 prep specialists. Content reviewed against the current ATI TEAS specification.

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