Question

^{When we heat iron rod its length increases. Will its height and weight will also increase?}

Answer 1

, if an iron rod is heated, it will get longer and fatter and its density will decrease. This happens because the mass of the rod stays the same, but its volume increases. The increase in the volume of matter with increasing temperature is called expansion. When cooled down, most matter decreases in volume and increases in density. This decrease in volume is called contraction.

SINCE ITS VOLUME INCREASES ITS HEIGHT WILL INCREASE BUT ITS WEIGHT REMAINS SAME