TEAS 7 Science: Your Complete Study Hub for 2026

By Sarah Mitchell · Updated April 13, 2026 · 14 min read

Science is the highest-weighted section on the TEAS 7 at 31% — and it's where most students lose the most points. But here's what I tell every student who panics about Science: you don't need to know everything. You need to know the right things, in the right order.

After tutoring 400+ TEAS students, I've mapped exactly which topics ATI loves to test. This hub organizes every Science resource we've built — study guides, cheat sheets, and practice tips — so you can stop Googling and start scoring. For the big picture of all four sections, see our Ultimate TEAS 7 Study Guide.

TEAS 7 Science Section at a Glance

Let's get the logistics straight first:

Science is the longest section and has the heaviest weight. It's also the section where students tend to have the widest score variance — meaning the difference between a well-prepared student and an unprepared one is massive.

Anatomy & Physiology (≈40% of Science)

A&P is the single biggest chunk of the Science section. Here are the body systems ranked by how often they appear, based on what our students report:

Biology (≈30% of Science)

Biology on the TEAS focuses on the fundamentals — cell structure, genetics, and life processes:

• Cell structure — organelles and their functions (mitochondria, ribosomes, Golgi, ER, nucleus)
• Cell division — mitosis vs. meiosis, chromosome count, stages
• Genetics — Punnett squares, dominant vs. recessive, genotype vs. phenotype
• DNA & RNA — structure differences, replication, transcription, translation
• Macromolecules — carbohydrates, proteins, lipids, nucleic acids and their building blocks
• Microorganisms — bacteria vs. viruses, basic classification

The highest-frequency question I see: "Which organelle is responsible for energy production?" (Mitochondria — the powerhouse of the cell. Yes, that meme is on the TEAS.)

Chemistry (≈20% of Science)

Don't panic. TEAS chemistry is not college-level organic chemistry. It's the fundamentals:

• Chemical bonds — ionic, covalent, hydrogen (and when each occurs)
• pH scale — acids vs. bases, pH of common substances, buffer systems
• States of matter — solid, liquid, gas, and phase transitions
• Chemical reactions — balancing simple equations, types of reactions (synthesis, decomposition, combustion)
• Atomic structure — protons, neutrons, electrons, atomic number vs. mass number
• Solutions — solute, solvent, concentration, dilution

Scientific Reasoning (≈10% of Science)

This is the section that tripped up the most TEAS 6 students when TEAS 7 launched — ATI increased the emphasis on thinking like a scientist, not just memorizing facts:

• Experimental design — independent vs. dependent variables, control groups
• Scientific method — hypothesis → experiment → data → conclusion
• Data interpretation — reading graphs, identifying trends, drawing inferences
• Cause vs. correlation — a favorite TEAS trap question

The good news: you likely already have these reasoning skills. These questions test logic, not memorization. Read the question carefully, look at what the data actually shows, and don't over-interpret.

Your Deep-Dive Science Study Guides

Each guide tackles a specific Science area in the depth you actually need for the TEAS:

4-Week TEAS Science Study Plan

Here's the study order I'd give you if you were sitting in my office right now:

The Top 5 Science Mistakes I See Every Week

1. Confusing arteries vs. veins — Arteries carry blood away from the heart (A = Away). Veins return blood. The pulmonary artery is the one exception students forget.
2. Mixing up mitosis and meiosis — Mitosis = 2 identical cells. Meiosis = 4 unique cells with half the chromosomes. ATI loves this distinction.
3. Getting pH backwards — Low pH = acidic, High pH = basic. Stomach acid is ~2, blood is ~7.4, bleach is ~13.
4. Confusing independent and dependent variables — The independent variable is what you change. The dependent variable is what you measure.
5. Spending too long on reasoning questions — These are logic puzzles. If you're stuck after 90 seconds, flag it and move on. Your time is better spent on A&P questions you know.

Test Your Science Knowledge

Think you're ready? Take our free practice quiz to see where you actually stand — before it counts:

TEAS 7 Science — Frequently Asked Questions