EVERYDAY SCIENCE

Detailed explanation-1: -Convection is heat transfer due to a density differential within a fluid. As water’s temperature increases in the presence of a heat source, it will become less dense and rise. As it moves up and away from the heat source, it cools and becomes more dense and sinks.

Detailed explanation-2: -Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.

Detailed explanation-3: -When part of a liquid or gas is heated, it expands and becomes less dense. The warmer, less dense liquid rises upwards, and the cooler liquid falls to take its place. This cycle of a liquid or gas rising and falling is called a convection current.

Detailed explanation-4: -The uneven heating of a fluid causes convection currents. As the fluid is heated, it becomes less dense and rises. The change in density is caused by the molecules of the fluid moving faster and further apart. The further apart the molecules are, the less dense the fluid will be, causing it to rise.

Detailed explanation-5: -So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.