Density of water varies with temperature. What are its consequences?

At 4°C, water has its maximum density, 1g/cm³ or 1000 kg/m³, and minimum volume. Its density decreases as the temperature increases or decreases from this point. The consequences of this are:

1. Water expands on freezing, i.e., 92 volumes of water become 100 volumes of ice. Therefore, with relative density of ice being 0.92, it floats on water.
2. It enables marine life to exist in the colder regions of the world because even when the water freezes on the surface, it remains in liquid state below the ice layer as the density of water is greater than the density of ice and ice is a bad conductor of heat.
3. It can cause pipes to burst in winter season because when water freezes it expands slightly.