No, it is not true that heat transfer by the movement of currents within a fluid is called density; it is actually called convection. Density is something else entirely, it refers to weight per a given volume. Of course, density is relevant to convection. Heat causes fluids to expand and therefore to become less dense, and therefore to rise.
convection current
convection
Convection is heat transfer by the movement of heated fluids. Heat transfer is the movement of energy from a warmer object to a cooler object.
It is called Convection.
The transfer of energy by movement of particles is called Convection.
convection current
The movement of water when ocean and fresh water meet is called Density currents.
The movement of energy from a warmer object to a cooler object is called convection currents
You are probably thinking of convection, which is transfer of heat by currents set up by variations in density of the liquid.
convection
Convection is heat transfer by the movement of heated fluids. Heat transfer is the movement of energy from a warmer object to a cooler object.
The ability of a material to transfer heat or electric current is called conductivity.
Convection
It is called Convection.
It just happens because of the differenciation in the air density which allows the so called convection currents to occur/form. Complex I know but is the closest conclusion.
motion
Convection is heat transfer by the movement of heated fluids. Heat transfer is the movement of energy from a warmer object to a cooler object.