// FIELD GUIDE 02 — LEVEL L1–L2 — READING TIME: 5 MIN
The four states of matter
Ice, water, steam — same stuff, three completely different personalities. And there's a fourth state most of the universe is made of that you've probably never held. The difference between them all is just one thing: energy.
// FIG. 01 — THE SAME PARTICLES, FOUR WAYS TO LIVE
CLICK A NODE OR A BUTTON TO CHANGE STATE
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// 01 — IT'S ALL ABOUT ENERGY
Everything is made of particles — atoms and molecules — and they never sit perfectly still. How much they jiggle depends on how much energy they have, and we feel that energy as temperature. Cold particles barely tremble. Hot particles rattle, tumble, and eventually fly. A "state of matter" is just a name for how much freedom the particles have won.
// 02 — SOLID: LOCKED IN FORMATION
In a solid, particles are packed tight in a fixed pattern, like soldiers standing in ranks. They vibrate on the spot but can't swap places — which is why a solid keeps its shape and can't be squashed. Ice, iron, and your desk all work this way. More vibration = hotter solid; enough vibration and the ranks break…
// 03 — LIQUID: A CROWD LEAVING A STADIUM
Add energy and the particles break formation. They still touch — that's why liquids can't be squashed either — but now they slide past each other. No fixed shape anymore: a liquid flows to fit whatever container it's in, pulled to the bottom by gravity. Melting is exactly this moment: the lattice giving up.
// 04 — GAS: TOTAL FREEDOM
Keep heating and the particles snap their last connections. Now they're free — flying in straight lines at hundreds of metres per second, bouncing off the walls and each other. A gas fills every corner of its container and is mostly empty space, which is why you can squash it. Air pressure is nothing more than billions of these particles drumming against you every second.
// 05 — PLASMA: SO HOT THE ATOMS BREAK
Push past thousands of degrees and something dramatic happens: collisions get so violent that electrons are ripped right off their atoms. What's left is plasma — a glowing soup of charged particles that conducts electricity and answers to magnets. It sounds exotic, but it's the most common state of matter in the universe: every star, including our sun, is a ball of plasma.
YOU'VE SEEN PLASMA YOURSELF:
Lightning is a plasma channel torn through the air. The glow inside a neon sign is plasma. So is the flash of a spark, the aurora, and the flame's brightest edge. (Ripping electrons off atoms should sound familiar — it's the energy-level jumping from
Field Guide 01, taken to the extreme.)
// 06 — CHANGING STATES
Every border between states has a name, and crossing it is just a matter of adding or removing energy:
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Each element crosses these borders at its own temperatures — that's its melting and boiling point. Try the temperature slider on our periodic table and watch all 118 elements change state as you sweep from 0 to 6000 K.