TEAS Science Practice Questions With Explanations

Q: What topics should I prioritize first for TEAS Science?

Start with anatomy and physiology basics, then review core biology and chemistry fundamentals. These areas appear often and connect to many question types.

Q: Is TEAS Science more memorization or application?

It leans towards basic application. You need to understand the idea well enough to apply it in a short scenario, not just repeat a definition.

Q: How do I study science efficiently if I do not have much time?

Do short daily practice sessions, review the explanation for every miss, and retest the same weak topic within 24 to 48 hours. That combo builds recall and accuracy faster than cramming.

Q: What is the best way to avoid “close but wrong” answers?

Look for the option that matches the concept exactly. Trap answers often use a correct word in the wrong context or add a detail that the question did not support.

Q: Do I need to know the real TEAS Science timing and question count too?

Yes, it helps for pacing. The official TEAS science section is longer than most quick practice sets, so use short quizzes for accuracy and separate timed practice for endurance.

Q: How should I review mistakes so they actually stick?

Write the concept in one line, note the clue you missed in the question, then create one quick example or mini-explanation in your own words. That is usually enough to prevent repeat misses.

Q: Does TEAS Science focus more on Anatomy and Physiology than chemistry?

Usually yes. Anatomy and physiology appear frequently because they connect to real healthcare topics. Chemistry tends to focus on fundamentals such as solutions, pH, and simple reactions.

Q: What body systems should I prioritize first for the biggest score lift?

Start with the cardiovascular, respiratory, digestive, urinary, endocrine, and nervous systems. Focus on each system’s function, the main organs, and how they work together.

Q: How deep do I need to go intogenetics for TEAS Science?

Know the basics: DNA vs RNA, dominant vs recessive traits, genotype vs phenotype, and simple inheritance logic. It is more about understanding than complicated math.

Q: Will I see questions that use charts, graphs, or simple data?

Sometimes. Be ready to read axes, notice trends, and choose the conclusion that matches the data without adding assumptions.

Question 1

An unknown element is found to contain 45 protons and an atomic mass of 64, what is its atomic number?

Accepted Answer

45. The number of protons in an atom’s nucleus is also the atomic number of the atom. In this case, we are told that there are 45 protons present and that the atomic mass is 64; however, when looking for the atomic number, we do not need the atomic mass. Consequently, the atomic number is 45.

Question 2

The square above is based on the eye color of two parents, one of whom has brown eyes and carries the recessive gene for green eyes (a). What is the probability that a biological child of these parents will have brown eyes?

Accepted Answer

50%. In the Punnett Square pictured, two of the children have brown eyes(A) and carry the recessive green gene(a) = (Aa), while two of the children have green eyes (aa). There is a 50% chance these parents will produce offspring with brown eyes (Aa).

Question 3

The spleen functions are part of the _____ system.
Which of the following completes the sentence above?

Accepted Answer

lymphatic. The spleen is part of the lymphatic system. Like the lymph nodes, it acts as a blood filter.

Question 4

Which of the following is an example of deductive reasoning?

Accepted Answer

All secretaries are good typists. Cynthia is a secretary. Therefore, Cynthia is a good typist. Deductive reasoning starts with basic premises that are assumed to be correct, and draws a specific logical conclusion. It often follows the logic: A ➞ B, C ➞ A, therefore C ➞ B. (C) might be tempting, but is an example of inductive reasoning. (A) and (B) are logically flawed.

Question 5

Which of the following is a possible cause of herniation of discs?

Accepted Answer

whiplash. Disc herniation occurs when the inner core of a disc in the spine leaks out through the outer portion of the disc. This type of spinal injury is usually caused by an injury to the back and/or spine. Whiplash suffered from a minor impact could potentially cause a herniated disc.

Question 6

Which of the following is a characteristic of the autonomic nervous system?

Accepted Answer

It regulates involuntary activity in the heart, stomach, lungs, and intestines. The somatic nervous system controls voluntary actions, while the autonomic nervous system functions primarily below the level of consciousness, to control functions such as digestion, heart rate, respiratory rate, perspiration, salivation, swallowing, and breathing. The central nervous system consists of the spinal cord and brain.

Question 7

During photosynthesis, which two compounds are combined to create the output of glucose and oxygen?

Accepted Answer

Carbon dioxide and water. During photosynthesis, water and carbon dioxide are absorbed by the plant and converted to glucose and oxygen.

Question 8

Questions 8 & 9 are based on the following diagram:

Which of the following is true about the frog?

Accepted Answer

It is a type of amphibian. Since the frog is inside the triangle, and the key indicates the triangle represents amphibians, it is logical to conclude that the frog is a type of amphibian.

Question 9

Which statement can be inferred about amphibians?

Accepted Answer

All amphibians are vertebrates, but not all vertebrates are amphibians. While all the amphibians are located inside the “circle” of vertebrates, there is nothing to indicate that ALL vertebrates are amphibians.

Question 10

What would this diagram be useful for?

Accepted Answer

determining outcomes for potential infection. The chart is not specific to any particular disease. Since it starts with “exposure” and ends with three phrases that all use the word “transmission,” the diagram is logically used to determine whether exposure to disease will lead to disease transmission.

Question 11

What type of bond between the complementary bases of DNA stabilizes the double helix structure?

Accepted Answer

hydrogen. Hydrogen bonds form between the bases to stabilize the double helix structure of DNA.

Question 12

Which of the following subatomic particles are found inside of an atom’s nucleus?

Accepted Answer

neutrons, protons. While the entirety of an atom’s nucleus contains neutrons, protons, and electrons, only the neutrons and protons are found inside of the nucleus. Electrons exist as a cloud surrounding the nucleus and thus are not found inside it.

Question 13

Which of the following statements is true regarding trophic levels?

Accepted Answer

Tertiary consumers acquire less energy than primary consumers. There is always a decrease in the amount of energy transferred from lower trophic levels to higher trophic levels. In general, the higher the trophic level of the consumer, the less overall available energy. Primary consumers have more energy available than both secondary and tertiary consumers.

Question 14

Why does the human eye perceive a red colored dress as the color red?

Accepted Answer

The molecules of the dress do not absorb red light wavelengths. When light hits an object, the object absorbs some of the light and reflects the rest of it. The wavelengths that are reflected determine how our eye perceives the color. We see a red dress as “red” because those wavelengths are reflected and not absorbed.

Question 15

In a lab experiment designed to test the rate at which plants grow under artificial light, the kind of light used is which type of variable?

Accepted Answer

independent. In an experiment, an “independent variable” is a factor controlled by the scientists. A “dependent variable” represents the output or effect. Since the light is controlled by the experimenters, it is an independent variable.

Question 16

Which organ system is primarily responsible for regulating metabolism, mood, and growth?

Accepted Answer

endocrine system. The endocrine system is the collection of glands that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep and mood, among other things. Also ‘Regulating’ is a big hint in this problem.

Question 17

In a vacuum, why doesn’t an elephant accelerate faster than a penny as it falls to the ground?

Accepted Answer

They both have an acceleration of 9.8 m/s2. More massive objects will only free-fall faster than smaller objects if there is a significant amount of air resistance present. For a penny and an elephant that are free-falling in a vacuum, the rate of acceleration would be the same, so both would fall at the acceleration due to gravity which is 9.8m/s2.

Question 18

Which train described below would have the greatest momentum?

Accepted Answer

A 9500 kg train car moving at 200 mph. The momentum of an object is equal to the mass of the object times the velocity of the object. The largest momentum from these choices comes from 9500 x 200 = 1.9 million.

Question 19

A scientist found that when an invasive species was introduced into a river, the population of salmon native to the region decreased. The type of correlation between these two populations could best be described as

Accepted Answer

an inverse relationship. When one factor affects a second factor, it can be said that the two have a strong correlation. Since the salmon population decreases as the invasive species population increases, these two factors have an inverse relationship.

Question 20

The addition of a catalyst to a chemical reaction will have what effect?

Accepted Answer

Increase the rate at which the reaction takes place. A catalyst, by definition, is an enzyme that helps decrease the energy necessary to begin a reaction. Consequently, the addition of a catalyst to a chemical reaction will increase the rate at which the reaction takes place. A reduction in the energy required to begin the reaction means that the reaction will take place more quickly.

TEAS Science Practice Questions With Explanations

Test Details

What This TEAS Science Practice Test Helps You Improve

Molly W.

Olivia B.

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Common Questions About the TEAS Science Test

What topics should I prioritize first for TEAS Science?

Is TEAS Science more memorization or application?

How do I study science efficiently if I do not have much time?

What is the best way to avoid “close but wrong” answers?

Do I need to know the real TEAS Science timing and question count too?

How should I review mistakes so they actually stick?

Does TEAS Science focus more on Anatomy and Physiology than chemistry?

What body systems should I prioritize first for the biggest score lift?

How deep do I need to go intogenetics for TEAS Science?

Will I see questions that use charts, graphs, or simple data?

TEAS Science Practice Questions With Explanations

Test Details

What This TEAS Science Practice Test Helps You Improve

Molly W.

Olivia B.

Pass the TEAS 7 — and get into nursing school.

Start a Free 3-Day Trial

Free for 3 days

Pass Guarantee—pass or your money back

1,000+ questions, every TEAS 7 content area

Reviewed by a nurse educator

100,000+ students prepped with AHC

— Yasmin, U.S.

More TEAS Practice Tests

Common Questions About the TEAS Science Test

What topics should I prioritize first for TEAS Science?

Is TEAS Science more memorization or application?

How do I study science efficiently if I do not have much time?

What is the best way to avoid “close but wrong” answers?

Do I need to know the real TEAS Science timing and question count too?

How should I review mistakes so they actually stick?

Does TEAS Science focus more on Anatomy and Physiology than chemistry?

What body systems should I prioritize first for the biggest score lift?

How deep do I need to go intogenetics for TEAS Science?

Will I see questions that use charts, graphs, or simple data?

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