What happens to the arrangement of water molecules as ice melts?

The arrangement of the water molecules begins to spread apart. (They would condense to form ice.)

As ice melts the molecules become less compact and start vibrating harder until the ice has changed state into liquid. They eventually form clumps of molecules and flow in their groups.

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

What essay do you want us to write?