Memorizing a definition of “control group” is not the same as finding it in a scenario.
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In 30 seconds
- 1Put anatomy and physiology first because it is the largest scored Science block, then cover biology, chemistry, and scientific reasoning.
- 2Learn body systems as connected flows and retrieve them from memory.
- 3Practice interpreting experiments and data—not just naming terms.
Use the exam weights and your baseline together
44
scored Science questions (ATI)
18
of them in human anatomy and physiology
ATI lists 44 scored Science questions: 18 in human anatomy and physiology, 9 in biology, 8 in chemistry, and 9 in scientific reasoning. The remaining delivered Science questions are unscored pretest items. Confirm the current breakdown on ATI's exam-details page. Start with the biggest overlap between high weight and low baseline, which a free full-length TEAS practice test shows you.
TEAS Science · scored questions
44 scored Science questions, by area
Per ATI’s exam details. The rest are unscored pretest items.
- Human anatomy and physiology18
- Biology9
- Chemistry8
- Scientific reasoning9
Scored-question counts from ATI’s TEAS exam-details page.
A&P: 18 scored questions, the largest block. Learn each system as a causal story.
Biology (9) and chemistry (8) are not separate trivia drawers. Ask how each foundation explains a body-system event.
Scientific reasoning (9). Variables, controls, sample limitations, graph trend, and the conclusion the data supports.
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Create my free accountLearn systems as causal stories
For each body system, draw the structures in order, state what moves through them, identify the regulated variable, and predict what happens when one step increases or fails. Blood flow, gas exchange, filtration, hormone feedback, and digestion become easier when organized around movement and control instead of disconnected labels.
Connect biology and chemistry to physiology
Cells, membranes, heredity, macromolecules, reactions, water, acids and bases, and enzymes are not separate trivia drawers. Ask how each foundation explains a body-system event. Connections give you more than one retrieval path and make novel questions less fragile.
Practice scientific reasoning as an action
Identify the independent and dependent variables, controls, sample limitations, graph trend, and conclusion supported by the data. Do this with new tables and experiments. Memorizing a definition of “control group” is not the same as finding it in a scenario. Try it on TEAS Science practice questions.
Use blank-page retrieval
Close the source and draw a pathway, explain a feedback loop, balance a simple relationship, or predict the direction of change. Check the result, correct the smallest failed rule, and return after a delay. Browse the TEAS Science topic map to turn this method into a complete checklist. The same loop across all four sections is in how to study for the TEAS, and the six-week TEAS study plan puts Science into weeks 2 and 3.
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Which TEAS Science area has the most scored questions?
Common questions
What should I study most for TEAS Science?
Human anatomy and physiology is the largest scored Science subcontent area in ATI’s blueprint, so it usually deserves the largest share of Science study time, adjusted for your baseline.
Is anatomy and physiology enough for TEAS Science?
No. The section also assesses biology, chemistry, and scientific reasoning.
How should I memorize body systems for the TEAS?
Learn each system as a flow: structures in order, each structure’s job, the regulated variable, and what changes when the flow is disrupted. Then retrieve it from a blank page or diagram.
Do I need advanced chemistry for the TEAS?
Study the chemistry objectives in the TEAS blueprint rather than an entire college chemistry course. Focus on the tested foundations and practice applying them.