Convection currents can form when there a temperature differential within the same body of a liquid or gas and the higher temperature obtains at a lower vertical position than the cooler liquid.
If the relative vertical temperatures are reversed, convection currents may be prevented by what is known as a thermocline, i.e., a static layer of liquid which effectively prevents mixing of the different temperatures necessary to produce convection.
has to be cold
Convection currents.
which diagram correctly indicates why convection currents form in water when water is heated
convection currents convection currents convection currents
convection currents convection currents convection currents
convection currents convection currents convection currents
because of differences in pressure and density in a fluid
Heat Energy
Solar energy
the form of energy would be heat. convection currents are caused by uneven heating of air or fluid. The warmer fluid is more boyant than the cooler fluid, so it floats to the top, and creates a "convection current"
Convection currents form when a fluid is heated from the bottom, causing it to rise and create a circulating flow. If a fluid is heated from the top, there is no temperature difference to drive the circulation, preventing convection currents from forming. Heat needs to be applied at the bottom to induce the necessary buoyancy-driven flow for convection currents to occur.
Convection currents move in the Mantle.