90 original TEAS 7-style science practice questions, each with a full rationale, distractor analysis, and study tips. Use these to drill the exact concepts the ATI TEAS tests — then jump into a timed quiz when you're ready.
Open any question to check the correct answer and a concise explanation. Each question also links to a dedicated study page with a full rationale and study tip.
In a balanced chemical equation, coefficients primarily represent what?
Answer: B. Relative numbers of particles or moles
Coefficients show the relative mole or particle ratios in which reactants combine and products form.
Read the full explanationWhat phase change occurs when a gas becomes a liquid?
Answer: C. Condensation
Condensation occurs when gas particles lose energy and enter the liquid state.
Read the full explanationWhy does increasing temperature usually speed a chemical reaction?
Answer: B. Particles collide more often and with greater energy
Higher temperature increases particle motion, producing more frequent and energetic collisions.
Read the full explanationWhich cavity contains the lungs?
Answer: B. Pleural cavities
Each lung occupies a pleural cavity within the thoracic cavity.
Read the full explanationWhich formed element is primarily responsible for blood clotting?
Answer: B. Platelets
Platelets adhere at damaged vessels and help form the platelet plug that initiates clotting.
Read the full explanationWhich gland releases thyroid-stimulating hormone?
Answer: A. Anterior pituitary
The anterior pituitary releases TSH, which stimulates the thyroid gland to produce thyroid hormones.
Read the full explanationWhat happens to thoracic volume when the diaphragm contracts during inhalation?
Answer: B. It increases
The contracting diaphragm flattens, increasing thoracic volume and lowering pressure so air enters the lungs.
Read the full explanationWhich factor is density dependent?
Answer: C. Competition for food
Competition becomes stronger as population density rises, making it a density-dependent limiting factor.
Read the full explanationOn a standard graph, where is the independent variable usually plotted?
Answer: B. On the x-axis
The independent variable is conventionally plotted on the horizontal x-axis.
Read the full explanationWhy is a control group used in an experiment?
Answer: B. To provide a baseline for comparison
A control group provides a baseline that helps isolate the effect of the independent variable.
Read the full explanationUse these focused guides to review the concepts behind the questions, then return to this bank for more practice.
Review anatomy, biology, chemistry, and scientific reasoning.
Practice body-system questions with detailed rationales.
Strengthen recall across major science concepts.
Review high-yield science facts and relationships.
Our full TEAS Science bank has hundreds more questions with timed mode, mark-for-review, and detailed score reports.
Start free practice