ASVAB subject guide
General science
Review broad life, earth, physical, and environmental science concepts.
Core review
What to study
- Connect body structures with their functions.
- Review matter, energy, force, and basic chemical changes.
- Know major earth systems and simple scientific-method steps.
Five-question review
Try original general science questions.
Attempt each question before opening the answer and explanation.
Which cell structure contains most genetic material?
- Cell membrane
- Nucleus
- Ribosome
- Vacuole
Reveal answer and explanation
Correct answer: Nucleus
In eukaryotic cells, most DNA is housed in the nucleus.
What process changes liquid water into water vapor?
- Condensation
- Freezing
- Evaporation
- Melting
Reveal answer and explanation
Correct answer: Evaporation
Evaporation is the change from liquid to gas at a liquid surface.
Which blood cells primarily carry oxygen?
- Red blood cells
- White blood cells
- Platelets
- Plasma cells
Reveal answer and explanation
Correct answer: Red blood cells
Hemoglobin in red blood cells binds and transports oxygen.
A substance with a pH of 2 is best described as:
- Acidic
- Neutral
- Basic
- Radioactive
Reveal answer and explanation
Correct answer: Acidic
Values below 7 on the pH scale are acidic.
Earth completes one revolution around the Sun in approximately:
- 24 hours
- 30 days
- 365 days
- 10 years
Reveal answer and explanation
Correct answer: 365 days
One Earth revolution around the Sun defines a year, about 365 days.
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