Anatomical Orientation, Organization, and Homeostasis
Use body directions, planes, and cavities.
About 16 minutes · 7-question quiz
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Open lesson →Free learning pilot. Only the published lessons and activities are included; this is not a complete exam preparation course.
TEAS 7 Exam Prep
Science Study Guide
Connect scientific concepts to body systems, diagrams and experimental evidence. Start with a lesson and review the key ideas. Use lesson questions when available.
30 lessons · Reading progress is separate from quiz results.
All study guides and lessons are free to read. Sign in only to save your progress or use account-based activities.
Body foundations
5 lessons on this pageCardiovascular System
Trace blood through the heart, lungs, and body.
About 18 minutes · 11-question quiz
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Recommended first: Anatomical Orientation, Organization, and Homeostasis. Suggestions, not required steps.
Open lesson →Respiratory System and Gas Exchange
Trace air to the alveoli.
About 17 minutes · 7-question quiz
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Recommended first: Anatomical Orientation, Organization, and Homeostasis. Suggestions, not required steps.
Open lesson →Digestive System and Nutrient Absorption
Trace food and accessory secretions.
About 17 minutes · 7-question quiz
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Recommended first: Anatomical Orientation, Organization, and Homeostasis. Suggestions, not required steps.
Open lesson →Nervous System and Neural Signaling
Compare nervous system divisions.
About 18 minutes · 10-question quiz
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Recommended first: Anatomical Orientation, Organization, and Homeostasis. Suggestions, not required steps.
Open lesson →Support & movement
3 lessons on this pageSkeleton and Bone Structure
Compare axial and appendicular bones.
About 22 minutes · 7-question quiz
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Recommended first: Anatomical Orientation, Organization, and Homeostasis. Suggestions, not required steps.
Open lesson →Joints and Movement
Classify the three structural joint types.
About 18 minutes · 7-question quiz
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Recommended first: Skeleton and Bone Structure. Suggestions, not required steps.
Open lesson →Muscles and Contraction
Compare the three muscle tissue types.
About 23 minutes · 7-question quiz
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Recommended first: Skeleton and Bone Structure, Joints and Movement. Suggestions, not required steps.
Open lesson →Regulation & defense
5 lessons on this pageEndocrine System and Hormonal Control
Match major glands, hormones, targets, and effects.
About 18 minutes · 10-question quiz
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Recommended first: Anatomical Orientation, Organization, and Homeostasis. Suggestions, not required steps.
Open lesson →Urinary System and Fluid Balance
Trace blood, filtrate, and urine routes.
About 18 minutes · 11-question quiz
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Recommended first: Cardiovascular System. Suggestions, not required steps.
Open lesson →Immune and Lymphatic Systems
Compare innate and adaptive defenses.
About 18 minutes · 10-question quiz
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Recommended first: Anatomical Orientation, Organization, and Homeostasis. Suggestions, not required steps.
Open lesson →Integumentary System and Thermoregulation
Compare the epidermis and dermis.
About 15 minutes · 7-question quiz
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Recommended first: Anatomical Orientation, Organization, and Homeostasis. Suggestions, not required steps.
Open lesson →Male and Female Reproductive Systems
Trace sperm and oocyte pathways.
About 18 minutes · 11-question quiz
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Recommended first: Endocrine System and Hormonal Control. Suggestions, not required steps.
Open lesson →Cells, genes & microorganisms
6 lessons on this pageCell Structure, Membranes, and Transport
Identify major cell structures and their jobs.
About 18 minutes · 10-question quiz
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Open lesson →Cell Cycle, Mitosis, and Meiosis
Put the main cell-cycle stages in order.
About 17 minutes · 7-question quiz
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Recommended first: Cell Structure, Membranes, and Transport. Suggestions, not required steps.
Open lesson →DNA, RNA, and Protein Synthesis
Relate DNA, genes, chromosomes, and proteins.
About 18 minutes · 10-question quiz
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Recommended first: Cell Structure, Membranes, and Transport. Suggestions, not required steps.
Open lesson →Mendelian Genetics and Inheritance
Tell genotype from phenotype.
About 18 minutes · 10-question quiz
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Recommended first: DNA, RNA, and Protein Synthesis. Suggestions, not required steps.
Open lesson →Biological Macromolecules and Enzymes
Match each macromolecule group to its building blocks and jobs.
About 17 minutes · 7-question quiz
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Recommended first: Cell Structure, Membranes, and Transport. Suggestions, not required steps.
Open lesson →Microorganisms, Disease, and Transmission
Compare bacteria, viruses, fungi, and protozoa.
About 16 minutes · 7-question quiz
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Recommended first: Immune and Lymphatic Systems. Suggestions, not required steps.
Open lesson →Chemistry foundations
4 lessons on this pageAtoms, Elements, Ions, and the Periodic Table
Identify protons, neutrons, and electrons.
About 22 minutes · 11-question quiz
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Open lesson →Chemical Bonds, Formulas, and Molecules
Compare ionic, covalent, and hydrogen interactions.
About 21 minutes · 8-question quiz
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Recommended first: Atoms, Elements, Ions, and the Periodic Table. Suggestions, not required steps.
Open lesson →Properties and Changes of Matter
Classify elements, compounds, and mixtures.
About 21 minutes · 8-question quiz
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Recommended first: Atoms, Elements, Ions, and the Periodic Table. Suggestions, not required steps.
Open lesson →Chemical Reactions and Equations
Identify reactants and products.
About 22 minutes · 11-question quiz
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Recommended first: Chemical Bonds, Formulas, and Molecules. Suggestions, not required steps.
Open lesson →Solutions & reactions
3 lessons on this pageReaction Rates, Equilibrium, and Catalysts
Use collision ideas to predict rate changes.
About 20 minutes · 8-question quiz
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Open lesson →Solutions, Concentration, and Solubility
Identify solute and solvent.
About 21 minutes · 8-question quiz
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Open lesson →Acids, Bases, and pH
Recognize acids and bases.
About 21 minutes · 8-question quiz
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Recommended first: Solutions, Concentration, and Solubility. Suggestions, not required steps.
Open lesson →Scientific investigation
4 lessons on this pageScientific Measurement, Units, and Tools
Match quantities with tools and SI units.
About 20 minutes · 8-question quiz
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Open lesson →Experimental Design and the Scientific Method
Write a testable hypothesis.
About 22 minutes · 11-question quiz
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Recommended first: Scientific Measurement, Units, and Tools. Suggestions, not required steps.
Open lesson →Data, Evidence, and Scientific Explanations
Tell observation from inference and conclusion.
About 21 minutes · 8-question quiz
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Recommended first: Experimental Design and the Scientific Method. Suggestions, not required steps.
Open lesson →Predicting Relationships and Outcomes
Identify direct, inverse, or no clear relationship.
About 18 minutes · 6-question quiz
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Recommended first: Data, Evidence, and Scientific Explanations. Suggestions, not required steps.
Open lesson →Free Science Practice Questions With Answers
Try these learning examples. Open “Show answer & explanation” to check your answer.
Question 1
A student compares plant growth under two light conditions. Which factor should be kept the same to make the comparison fair?
- The light condition being tested
- The amount of water each plant receives
- The final height of every plant
- The growth rate measured at the end
Show answer & explanation
Answer: The amount of water each plant receives
Why: Water is a controlled variable in this comparison. Keeping it the same helps isolate the effect of the light condition. Final height and growth rate are outcomes, not factors to force to be equal.
Question 2
Which structure forms a selectively permeable boundary around a typical animal cell?
- Cell membrane
- Cell wall
- Chromosome
- Ribosome
Show answer & explanation
Answer: Cell membrane
Why: The cell membrane regulates movement of substances into and out of the cell. Animal cells do not have cell walls; chromosomes carry genetic information and ribosomes make proteins.
Question 3
An atom gains one electron without changing its number of protons. What happens to its electric charge?
- It becomes one unit more positive
- It becomes one unit more negative
- Its charge cannot change
- Its proton number doubles
Show answer & explanation
Answer: It becomes one unit more negative
Why: Electrons carry negative charge. Gaining one electron makes the net charge one unit more negative while leaving the proton number unchanged.