Liquids are the third state of matter. Liquids don’t have a definite shape but has a definite size. A liquids molecules flow around each other. Now listen to this, the measurement of how runny the liquid is it is called viscosity. high viscosity means that the liquid is runny. If the liquid has a low viscosity then it will be slow. viscose means how thick a liquid is like honey is very viscose because it is very thick. If a liquid is 100 degrees Celsius or over water will evaporate but, if water reaches 0 degrees Celsius or below it will freezes.