A piece of iron railway track will get longer when it is in the hot sun, and that is why there are usually gaps between pieces of track.

When the track expands the iron atoms:

Question

A piece of iron railway track will get longer when it is in the hot sun, and that is why there are usually gaps between pieces of track. 
   
 When the track expands the iron atoms:

Accepted Answer

vibrate more so the atoms take up more space.

Answer

I don't know.

Answer

form bigger molecules so that they take up more space.

Answer

contain electrons that move faster so the atom takes up more space.

Answer

increase in size so they take up more space.

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A piece of iron railway track will get longer when it is in the hot sun, and tha...

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