GEOLOGY

Detailed explanation-1: -At a temperature of 4° C pure water reaches its maximum or peak density, cooled further it expands and becomes less dense than the surrounding water which is why when water freezes at 0° C it floats.

Detailed explanation-2: -Cold, salty water is dense and sinks to the bottom of the ocean while warm water is less dense and remains on the surface. Cold water has a higher density than warm water.

Detailed explanation-3: -Cold, salty water is denser than warm, fresher water and will sink below the less dense layer. Density is defined as the measure of a material’s mass (e.g. grams) divided by its volume (e.g. milliliters). Mixing of seawater influences the density of seawater thereby affecting ocean circulation.

Detailed explanation-4: -saltwater has a higher density than freshwater. less dense matter will lie above more dense matter.

Detailed explanation-5: -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.