Purpose: Develop competency in the three subtests that drive technical line scores: General Science (GS), Electronics Information (EI), and Mechanical Comprehension (MC).

| Section | File | Topics | |---------|------|--------| | 4.1 | Life Science | Cells, body systems, ecology, genetics | | 4.2 | Physical Science | Newton's laws, energy, thermodynamics, waves, chemistry basics | | 4.3 | Electronics Fundamentals | Ohm's Law, series/parallel circuits, components | | 4.4 | Mechanical Principles | Simple machines, levers, pulleys, gears, work, hydraulics | | 4.5 | Applied Science Questions | Scenario-based practice across all science/technical topics |

Key Concepts:

• GS: ~50% life science, ~50% physical science; 30 seconds per question
• EI: Ohm's Law (V=IR), series vs. parallel behavior — tested on almost every exam
• MC: Mechanical advantage and force-distance trade-off for all simple machines
• Applied questions: Identify the domain → name the principle → apply the formula

Line Score Impact: GS, EI, MC collectively appear in EL, GM, MM, ST (Army) and E/M composites (Air Force).

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