When a metal bar is heated....the particles in the area of the metal bar that is hot start vibrating.. knocking into each other and passing the heat energy on to cooler particles. The cooler end that isn't heated still has a rise in temperature just not as much as the heated area because the heat has almost been diluted.
It vibrates about in its fixed positions more vigorously.
The density will decrease because the heated metal contracts and its particles slow down.
The particles spread out and 'jumble' . Hope this helps ;) x
The particles in a solid start to move faster and faster as they are heated. Eventually they may move fast and freely enough to reach the liquid state, and if they continue to be heated, the particles could obtain enough energy to leave the liquid state and go into the gaseous state.
Particles vibrate faster when they are heated.
When a solid is heated the particles vibrate more and they break free of the mold they are in. This makes the solid a liquid. if you continue to heat it, the vibrations will get stronger and the particles will start to evaporate. When the particles evaporate, then it would be a gas.
The motion of particles is accelerated.
The density will decrease because the heated metal contracts and its particles slow down.
The particles in a liguid are bonded (not as strongly as a solid which is why it flows.) when it is heated the particles vibrate and eventually the bonds break and the particles break away. This is evaporation.
The speed of the gas particles will increase as they are heated. That is why the pressure in a container increases. The particles are hitting the walls of the container with more force as they are heated.
the partcles get closer together or the particles get bigger. you decide
they get excited and move around faster
The atoms that make up the metal are loosened up by the heat, therefore causing the metal structure to become more flexible.
goes bigger
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The particles start moving faster and the matter expands.
if they are heated then they turn to a liquid, if that are a soled well they are hard like ice
it wil expand