Tuesday, December 23, 2014

Shape Shifter 

Water is the only naturally occurring substance on earth that takes three forms: liquid, gas, and solid. When water, H2O,  changes phase its physical appearance changes due to parting of molecules. For example, in the solid phase water molecules are close together and in the gaseous phase they are the furthest apart. Did you know that frozen water is about 9% lighter than liquid water?  This is why ice floats on water.