ATI TEAS Science Practice Test Exam Questions and Verified Answers | Biology, Chemistry, Anatomy, Physiology, Scientific Reasoning & Human Body Systems | Updated 2026/2027 | Instant Download

Prepare for the ATI TEAS Science examination with this focused Science Exam Questions and Verified Answers study resource. Designed for nursing school applicants and pre-nursing students, this material reviews essential scientific principles across biology, chemistry, anatomy and physiology, genetics, geology, and scientific investigation. The biology section covers adaptation, genetic variation, taxonomic classification, and the scientific understanding of how organisms survive and reproduce in changing environments. Review the meaning of adaptation, understand the role of alleles in inherited variation, and distinguish major taxonomic ranks, including phylum, order, family, and genus. The material also introduces paradigm shifts in scientific thinking and the importance of evidence in refining scientific knowledge. The chemistry section explores hydrocarbons, chemical bonding concepts, proton and electron characteristics, and the physical properties of water. Review how water's high specific heat and high heat of vaporization influence temperature regulation and phase changes. Questions on hydrocarbon formulas help reinforce foundational chemistry knowledge and the identification of compounds containing carbon-carbon double bonds. The anatomy and physiology section examines major human body systems and their essential functions. Review how the cardiovascular system transports oxygen and nutrients, how blood flows from the right ventricle into the pulmonary artery, and how the respiratory system supplies oxygen while removing carbon dioxide. Additional topics include the skeletal system and the spine, digestive tract peristalsis, smooth muscle function, and the beginning of fat digestion in the small intestine. Scientific reasoning is another key focus. Review the sequence of hypothesis development, data collection, and analysis, alongside the use of numerical information in quantitative investigations. These concepts support a stronger understanding of research methods and evidence-based scientific conclusions. Key topics covered include: - ATI TEAS Science examination preparation - Biology and foundational life science concepts - Adaptation, alleles, and genetic variation - Taxonomic classification and biological hierarchy - Paradigm shifts in scientific understanding - Scientific process and research methodology - Quantitative investigations and numerical data - Hydrocarbons and chemical formulas - Carbon-carbon double bonds and unsaturated compounds - Protons, electrons, electrical charge, and relative mass - Water's specific heat and heat of vaporization - Cardiovascular system structure