How is density related to convection currents?

Answer 1

Put simply things that are of lower density will float on things that have a higher density.

If you take a fluid (i.e. air or water) and heat it, the portion that is heated usually expands. The same mass takes up more volume and as a consequence the heated portion becomes less dense than the portion that is not heated.

The heated portion therefore floats upwards and this portion has to be replaced by colder fluid as it does so.

This flow is called convection, it is an effect of density variations and the driving energy for the movement is heat.

Answer 2

Density is the amount of anything in a certain space; the quantity of a matter in a given area. Hot liquids are less dense than cold liquids. Currents are a flow of water, air, or any liquid (or gas). Convection currents are circular currents or movement within a liquid (or gas) due to different densities of the hotter and cooler parts. Hot liquids are less dense than cold and will rise. In the earth's deep mantle and outer core, the magma that is closer to the exteremely hot inner core rises because it's less dense and then pushes the cooler magma that is further from the intense heat down. When the cooler magma is pushed down, it is heated more and rises. The somewhat less hot magma is more dense and so sinks. This motion is convection currents and is what causes the plates to move that are riding on the surface of all of this.

The Earth's crust is composed of continental plates that are in constant motion because of the convection currents in the Earth's mantle and outer core. It is this movement that causes earthquakes and volcanoes.

Answer 3

A volume of less-than-average density of a liquid will start to rise in the same manner as a balloon. As it rises, volumes of average density flow in below. the surrounding fluid falls to fill the volume left by the fluid flowing in underneath, and, finally the rising volume pushes fluid up and outward. This generates a circular flow which will slow to a stop once equilibrium is reached. If there is a heat source in the fluid it will continually generate lower density fluid, and the convection flow will become continuous.

Answer 4

A volume of less-than-average density of a liquid will start to rise in the same manner as a balloon. As it rises, volumes of average density flow in below. the surrounding fluid falls to fill the volume left by the fluid flowing in underneath, and, finally the rising volume pushes fluid up and outward. This generates a circular flow which will slow to a stop once equilibrium is reached. If there is a heat source in the fluid it will continually generate lower density fluid, and the convection flow will become continuous

Answer 5

Density is a key factor in driving convection currents. In a fluid, warmer regions have lower density and rise while cooler regions have higher density and sink. This density difference creates a flow of material, known as a convection current, where warmer fluid displaces cooler fluid.

Answer 6

It is related by the grams that are measured by density

Answer 7

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