what are convectional currents ?

Answer 1

1.Convection currents occur when a liquid or a gas is heated. The heated particles become less dense than the cold ones (because they're particles are moving faster) so they rise on top. The cold particles heat up beacause they're closer to the heat source and the hot particles cool down becuase they're farther away. This forms a kind of cycle, which is called convectiob.

2. A convection current is found in plate tectonics. A convection current is a stream of upwelling mantle rock that rises steadily beneath a spreading plate boundary. Convection currents move inside the earth. Heat that is made in the hot core causes convection currents. Convection currents are strong enough to move and break the hard layer above it. Convection currents are circular movements within a liquid or gas because of different densities of hotter and cooler areas.

Answer 2

Let me explain first about the Earths currents of heat that flows from the core to the crust. These flows are called convection currents. These currents cool down as they flow closer to the surface of the Earth. As a result of these functions the rising of the currents decreases and travels into horizontall directions along the bottom of the Earths crust. When the currents cool down the convection currents plummets again to the inner Earths core where there temperatures increase and the currents rise again. These current flows are continuous. These functions also takes place in the "mantle" where large convection systems may carry along the plates of the lithosphere like a conveyor belt, which floats on top of the asthenosphere.

Answer 3

Convection currents are flows of a fluid, brought about by changes in temperature causing changes in density, which disperse heat, that is promote transfer of heat.