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Science & Technical
Medium
GS

General Science

Life, earth, space and physical science

A broad science subtest at roughly high-school level: life science (biology), earth and space science, and physical science (basic chemistry and physics). Not part of the AFQT, but it feeds many line scores for technical and medical jobs.

Duration
~12 min
Length
20 questions
Difficulty
Medium

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New to the ASVAB? Read the complete guide
Every subtest explained, how the AFQT and line scores work, and how to study.

What to expect

  • Recall-style four-option questions across all science areas.
  • On the real paper ASVAB: 25 questions in 11 minutes. Here: 20 questions.
  • A concise explanation that teaches the fact, not just the answer.

What it measures

  • Life science: cells, human body, genetics, ecology
  • Earth & space science: geology, weather, astronomy
  • Physical science: basic chemistry and physics

Instructions

  1. 1It's breadth, not depth — know a little about a lot.
  2. 2Learn the basics: cell parts, body systems, the water cycle, states of matter.
  3. 3Don't overthink — most answers are straightforward facts.

Tips

  • Prioritise biology and earth science — they appear most.
  • Learn metric units and simple physics (force, energy, motion).
  • Flashcards work well for this subtest.
Format: Science subtest · recall · 4-option MCQ · real test 25 Q / 11 min