3 states of matter.

**The reasoning** Matter exists in different physical forms based on how tightly its particles are packed and how they move. The three fundamental states are: 1. **Solid** — particles packed tightly, fixed shape (like ice, wood, metal) 2. **Liquid** — particles loosely connected, takes shape of container (like water, oil) 3. **Gas** — particles spread far apart, fills entire space (like air, steam) This is a foundational concept in Chemistry and Physics. Everything around you fits into one of these three states (plus plasma, which you'll learn later). **Why the wrong options tempt you** **B) Hot, warm, cold** — These describe *temperature*, not states of matter. The trick is that temperature can *change* the state (heating ice → water → steam), but they're not the states themselves. **C) Big, medium, small** — This describes *size*, which has nothing to do with matter's physical form. **D) Hard, soft, smooth** — These describe *texture* or how something feels, not the scientific classification of matter. **Quick takeaway** Remember: **SLG = States, not feelings** — Solid, Liquid, Gas are scientific states of matter; everything else describes properties or conditions of matter.