The three primary states of matter are:

1. Solid – Particles are tightly packed, giving a fixed shape and volume (e.g., ice, metal, wood).
2. Liquid – Particles are loosely packed, allowing it to take the shape of its container while maintaining a fixed volume (e.g., water, oil, milk).
3. Gas – Particles are far apart and move freely, filling the shape and volume of their container (e.g., oxygen, carbon dioxide, steam).

There are also other states like plasma and Bose-Einstein condensate (BEC) in advanced physics! 🚀