How dose ice melt? how dose it form?

Ice melts from heat , it forms when it freezes up

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water