The molecules in an object begin to move because of the heat. The moving of the molecules cause the space between them to expand. That is how blacksmiths are able to change the shape of metals.
the wavelength of emission becomes shorter
It will melt if heated hot enough.
how do I know
thermal expansion
The gas will expand as it is heated.
It expands.
[object Object]
the wavelength of emission becomes shorter
weaken
The volume of a substance increases when heated
When matter is heated it will expand
no
When solids are heated they turn into liquid
no answer
Atoms or molecules when they are heated.
how do I know
It will melt if heated hot enough.