Because the electrons in the atoms of the metal are being excited to a higher energy level they must "de-excite" and go back down to a lower level. When this occurs EM radiation is given off. If this radiation is in the visible light domain it will have an associated wavelength. This wavelength happens to be in the visible spectrum of red/orange/yellow light when metal is heated. Also, there are other types of non-visible radiation when heated, i.e. IR radiation.
it gets hot
************2nd Opinion*************
It expands, getting longer, thicker, and wider. Mostly longer.
When a metal bar is heated, the particles speed up and cause vibration. the vibration takes up more space so the bar expands.
nothing, the size of any metal usually expands when heated, but unless you are heating it in a forge also you have to heat it almost to melting point.
Because the metal lid expands quicker than the glass jar - making it loose.
it expands
It expands.
The individual particles vibrate/move faster. The matter as a whole expands.
Metal expands when it is heated. Since track is made of metal then it expands when it is heated by the sun.
metal is a solid that expands when heated also of course when liquids are heated and change state into a gas they expand but metal is cool because it expands before it changes state
No, the volume of a metal increases as it is heated. It expands.
Your answer is in the question. If something expands, it obviously gets bigger. Therefore, the metal will get larger.
Lead...
Metal expands when heated, friction.
Right.
The sheet expands outwards as well
Molecules move back and forth faster and faster causing expansion
Matter usually expands when heated.
convection means when something is heated it expands or conducts eg. metal is heated it contracts when it is cooled it contracts.
Each metal expands at different rates! One kind of metal expands faster than the other so to make room but still be at the same length with the other metal, it bends.