Video narration
How can the same material be a hard ice cube, flowing water, or invisible steam? They're all matter, made of tiny particles. In a solid, those particles are packed closely and only vibrate in place, so the ice keeps its shape. In a liquid, they stay close but slide past one another, letting water flow and fit its container. In a gas, they spread far apart and move freely, so steam expands through the air. Here's the flip: these are not different kinds of matter. They are the same tiny particles, arranged and moving in different ways. Add much more energy, and you get plasma: matter whose particles are electrically charged, like in lightning or the Sun. So why can one material behave so differently? Because its particles carry different amounts of energy and move differently: solid, liquid, gas-and, with much more energy, plasma.