Ace Your TEAS Science Section
The TEAS science section is a challenging one. Learn about the science topics on the test, solve some free sample questions, and find out how TestPrep-Online can help you prepare.
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About the TEAS Science SectionThe TEAS Science section is slightly different from the other sections as it requires a great deal of preparation. It relies on familiarity with topics that are studied in college courses, and it is based primarily on knowledge (excluding scientific reasoning questions). Therefore, it is highly recommended to go through the materials studied in courses such as cell biology, biochemistry, physiology, human anatomy, chemistry, earth sciences, etc.
TEAS Science Section TopicsThe questions on the TEAS Science section are simple and concise. As long as you possess the knowledge, the questions should be easy and straightforward. There are four topics on the TEAS Science section:
- Human body science – includes questions about the functions of the body's systems, anatomy and physiology, population growth/decline, and birth/fertility rates.
- Life science – includes questions about general biology, cell biology, photosynthesis, and genetics.
- Earth and physical science – includes questions about chemistry and biochemistry, and requires knowledge of kinetics and familiarity with the periodic table of elements.
- Scientific reasoning – includes reasoning questions on different topics. In some cases, you will be presented with an experiment that is followed by a question regarding the researchers' intentions, different interpretations, or explanations of the results. In others, you will be asked about the roles of a certain method, appliance, apparatus, or technique.
Note that the questions in the last topic (scientific reasoning), which make up 15% of the science section, are in a different format than the other questions. They don't rely purely on knowledge, but on reasoning as well.
Study tip: It is recommended to compare the list of relevant courses you took to the list of topics on the TEAS. This way, if you have any gaps, you will know where to put more emphasis in your studies.
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Sample TEAS Science Questions
Physiology (Topic 1)Which of the following diseases is caused by vitamin C deficiency?
The correct answer is (C).
Scurvy is the disease caused by vitamin C deficiency. Vitamin C is found in fresh fruit and vegetables. Therefore, scurvy used to be highly prevalent in sailors, whose diets lacked fresh produce. Vitamin C plays a key role in the formation of collagen, a protein found in connective tissue. A deficiency of vitamin C is characterized by lethargy, gum disease, edema, and more. This deficiency can be cured by consuming citrus fruits or other vitamin-C-rich foods.
Rickets is a disease caused by vitamin D deficiency. Vitamin D is synthesized in the human body upon exposure to sunlight. Therefore, Rickets was highly prevalent during the Industrial Revolution in Europe, where children worked in factories and were exposed to very little sunlight while growing up.
Beriberi is a disease caused by vitamin B1 deficiency. Since vitamin B1 is abundant in whole rice, meat, and legumes, Beriberi is prevalent is certain areas in Asia where the diet is composed primarily of white rice.
Anemia is a disease caused by a red blood cells (RBC) deficiency or by a hemoglobin deficiency. Such deficiencies can be the result of malnutrition, infections, genetic diseases, and more.
Life Sciences (Topic 2)Which of the following is caused by fermentation?
- Water turning stagnant
- Holes in a cheese block
- Reduction of carbon dioxide by bacteria
- The growth of mold on bread
The correct answer is (B).
During the process of making some cheeses, certain types of fermenting bacteria consume the lactic acid secreted by other bacteria in an oxygen-free environment and produce carbon dioxide gas. The formation of gas inside the cheese causes holes, also referred to as "eyes."
Fermentation is the process of consuming energy in the absence of oxygen. This process, performed by certain types of microorganisms, has been used for thousands of years during the process of making beer, wine, bread, cheese, etc.
Stagnant water is not a result of fermentation, it results when water stops flowing. The reduction of carbon dioxide to sugars is called photosynthesis, and is performed by plant cells and unicellular organisms such as cyanobacteria. The growth of mold on bread is oxygen dependent process.
Biochemistry (Topic 3)Which of the following is required for active transport and not for passive transport?
- A concentration gradient in the direction of transport
- A transmembrane protein
The correct answer is (A).
Transport is the movement of ions and molecules across the membrane. Active transport is the process by which ions and molecules cross the membrane against their gradient (i.e., from low concentration to high concentration). In active transport, an energy source is necessary — usually ATP molecules or coupling to the passive transport of another ion or molecule. (Alternatively, in passive transport, the molecules cross the membrane in the direction of their concentration gradient).
A membrane is required for the compartmentalization that is a basic condition for transport of all kinds. A transmembrane protein is also needed for all types of transport, while a concentration gradient in the direction of transport is only available in passive transport.
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TEAS Science PracticeTestPrep-Online offers full-length TEAS practice tests as well as two TEAS Science practice tests to help you study for the test. Test your knowledge of the TEAS test topics with our pack, spot your strengths and weaknesses, and learn more with our thorough explanations of each question. Our TEAS Science questions were written by professional biologists, and the mock tests highly resemble the actual TEAS exam.
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