Liquids and gasses tend to expand when heated,
this lowers the density,
thus warm "air" rises and cool air falls.
No. The crust is rigid; it does not allow convection.
the convection currents will stop
the convection currents will stop
the convection currents will stop
The convection currents will stop
convection
asthenosphere
It falls back down
If Earth's interior cools to a non liquid state, the convection currents will stop.
Convection can happen in fluids such as air and water, where differences in temperature cause the fluid to rise and fall in a circular motion. This process helps to distribute heat energy more effectively and can be observed in phenomena like ocean currents, boiling water, and atmospheric circulation.
Convection requires the movement of a fluid, such as liquid or gas, to transfer heat. In a solid, the particles are tightly packed and cannot easily flow or move past each other to carry heat through convection. As a result, convection does not occur in solids.
Convection can happen in any state of matter in which the matter is free to move - such as a liquid, a gas, a plasma, a superfluid, a liquid crystal, etc.