One reason could be inaccuracies in measuring. Another reason is that the density of water changes with temperature. Water is most dense at 4 °C and at that temperature has a density of 1 g/cm 3. At ...

Tell students that in Chapter 3, they have seen that different substances have different densities. In this activity, they will see that the same substance can have different densities at different ...

Water contracts when it is cooled but, unlike other liquids, it then starts to expand at temperatures a few degrees above the melting point of ice. However, a new experimental study suggests that ...