AP BIOLOGY

Detailed explanation-1: -Water has its maximum density of 1g/cm3 or 1000kg/m3 at 4∘C. When the temperature changes from either greater or less than 4 degrees, the density will become less than 1g/cm3. Water has the maximum density of 1g/cm3 only when it is pure water.

Detailed explanation-2: -Water has its maximum density of 1g/cm3 or 1000kg/m3 at 4∘C.

Detailed explanation-3: -When water is cooled, the density of water gradually increases till 4o C. At 4oC, water exhibit maximum density and minimum volume. On further cooling down, water expands and the density of water decreases from 4oC to 0oC.

Detailed explanation-4: -The maximum density of water is 103 kg m-3 at 4oC temperature. The maximum water density occurs at 4°C since two opposing effects are in equilibrium at this temperature. The water molecules in ice are in a crystal lattice that has plenty of empty space.

Detailed explanation-5: -In case of water, the volume is minimum and density is maximum at 4∘C, whether the temperature is increased or decreased the volume of water increases and density decreases. This behaviour of water is called the Anomalous Expansion of Water.