TEAS 7 practice questions › Science

TEAS 7 Science practice questions

12 free practice questions with answers and explanations. Science is the largest section. It focuses on human anatomy and physiology, with shorter sets on biology, chemistry and how scientific investigations are designed and interpreted.

The Science section at a glance

50questions (44 scored)
60minutes
4sub-areas
Sub-areaScored questions
Human anatomy and physiology18
Biology9
Chemistry8
Scientific reasoning9

Source: ATI TEAS content specifications. The remaining 6 questions are unscored pretest items, and you won't know which ones they are.

Practice questions

Answer each question first, then open “Show answer” to check yourself.

Question 1 · Human anatomy and physiology

Which chamber of the heart pumps oxygen-rich blood to the rest of the body?

  1. Right atrium
  2. Right ventricle
  3. Left atrium
  4. Left ventricle
Show answer

Correct answer: D. Left ventricle

The left ventricle pumps oxygenated blood into the aorta and out to the body.

Question 2 · Human anatomy and physiology

Where does most absorption of nutrients take place?

  1. Stomach
  2. Small intestine
  3. Large intestine
  4. Esophagus
Show answer

Correct answer: B. Small intestine

The small intestine, lined with villi, absorbs most nutrients. The large intestine mainly absorbs water.

Question 3 · Human anatomy and physiology

What is the functional unit of the kidney?

  1. Neuron
  2. Nephron
  3. Alveolus
  4. Glomerulus only
Show answer

Correct answer: B. Nephron

The nephron filters blood and forms urine. The glomerulus is only one part of the nephron.

Question 4 · Human anatomy and physiology

Which organ secretes insulin?

  1. Liver
  2. Thyroid
  3. Pancreas
  4. Adrenal gland
Show answer

Correct answer: C. Pancreas

Beta cells in the pancreas secrete insulin, which lowers blood glucose.

Question 5 · Human anatomy and physiology

In the lungs, gas exchange between air and blood occurs in the:

  1. Bronchi
  2. Trachea
  3. Alveoli
  4. Pleura
Show answer

Correct answer: C. Alveoli

Alveoli are tiny air sacs surrounded by capillaries, where oxygen and carbon dioxide are exchanged.

Question 6 · Biology

Which organelle produces most of a cell's ATP?

  1. Nucleus
  2. Ribosome
  3. Golgi apparatus
  4. Mitochondrion
Show answer

Correct answer: D. Mitochondrion

Mitochondria carry out cellular respiration, producing most of the cell's ATP.

Question 7 · Biology

Two parents are both heterozygous (Aa) for a trait. What is the probability that a child will be aa?

  1. 0%
  2. 25%
  3. 50%
  4. 75%
Show answer

Correct answer: B. 25%

A Punnett square for Aa × Aa gives AA, Aa, Aa, aa. One of four outcomes is aa: 25%.

Question 8 · Chemistry

A solution has a pH of 3. This solution is:

  1. Strongly basic
  2. Neutral
  3. Acidic
  4. Slightly basic
Show answer

Correct answer: C. Acidic

pH below 7 is acidic; 7 is neutral; above 7 is basic.

Question 9 · Chemistry

An atom has 11 protons and 12 neutrons. What is its mass number?

  1. 1
  2. 11
  3. 12
  4. 23
Show answer

Correct answer: D. 23

Mass number = protons + neutrons = 11 + 12 = 23.

Question 10 · Scientific reasoning

A researcher gives volunteers different doses of caffeine and measures their reaction times. What is the independent variable?

  1. Reaction time
  2. Dose of caffeine
  3. Number of volunteers
  4. Time of day
Show answer

Correct answer: B. Dose of caffeine

The independent variable is the one the researcher changes on purpose: the caffeine dose. Reaction time is the dependent variable.

Question 11 · Scientific reasoning

In the same study, one group receives no caffeine. What is the purpose of this group?

  1. To increase the sample size
  2. To provide a baseline for comparison
  3. To test a second hypothesis
  4. To measure caffeine side effects
Show answer

Correct answer: B. To provide a baseline for comparison

The control group shows what happens without the treatment, so effects of caffeine can be compared against it.

Question 12 · Scientific reasoning

Which of the following is a testable hypothesis?

  1. Sleep is the most enjoyable part of the day.
  2. Students who sleep 8 hours score higher on a memory test than students who sleep 4 hours.
  3. Everyone should sleep more.
  4. Dreams are more interesting than real life.
Show answer

Correct answer: B. Students who sleep 8 hours score higher on a memory test than students who sleep 4 hours.

A testable hypothesis predicts a measurable relationship between variables. The others are opinions.

Tips for the Science section

  • Anatomy and physiology carries the most scored questions (18 of 44), so study body systems first.
  • For each body system, know its main organs, what they do and how the system works with others.
  • Review basic chemistry: atomic structure, the periodic table, pH, and types of chemical reactions.
  • For scientific reasoning, practice identifying independent and dependent variables, controls and valid conclusions.
  • You have about 72 seconds per question.

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These are original practice questions written for the published ATI TEAS 7 outline. They are not official TEAS questions. More sections: Reading · Math · English and Language Usage