When ice melts, its density _______?

CONCEPT:

• Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume. 
  • An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).
• Ice: ​It is one of the states of water, amongst other states i.e. Liquid, Solid, and Gaseous.

​EXPLANATIONS:​

• Melting of ice: 
  • ​When you heat ice, its temperature rises, but as soon as the ice starts to melt, the temperature stays constant until all the ice has melted.
  • This happens because all the heat energy goes into breaking the bonds of the ice's crystal lattice structure.
• The ice shrinks (decreases volume) and becomes denser. The ice density will increase from 0.92g/cm³ to that of liquid water (1g/cm³​).
• so, density increases Hence option 2 is correct.