Question

The density of water varies with temperature. What are its consequences?

Answer 1

Consequences of density change :

• Density refers to mass per unit volume
• The density of water is approximately one gram per cubic centimetre.
• It is dependent on its temperature, but the relation is not linear.
• The liquid water becomes dense when it is allowed to cool at room temperature but at $4°\mathrm{C}$ pure water reaches its maximum density.
• As it is cooled it expands to become less dense.
• The solid ice is denser than the liquid phase, so it sinks into the water.
• If water has a density more than ice then all the seawater from the base would have become ice.