EVERYDAY SCIENCE

Detailed explanation-1: -When the water is heated, it expands, increasing in volume. This is represented by the increase in the size of the box from Fig. 2.2 A to 2.2 C. The warmer the water, the more space it takes up, and the lower its density.

Detailed explanation-2: -Density and Temperature Relationship When density decreases, temperature increases. When more temperature increases, density reduces. When the temperature decrease, density increases.

Detailed explanation-3: -Water density changes with temperature and salinity. Density is measured as mass (g) per unit of volume (cm³). Water is densest at 3.98°C and is least dense at 0°C (freezing point).

Detailed explanation-4: -Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.

Detailed explanation-5: -When water is at 0 ° C, it takes a cage-like structure, and thus the volume increases which results in the density decrease. The temperature of the water increases and gets to 4 ° C, here, the density is maximum. The reason behind this is that the cage-like structure starts to break and come closer.