Convection is fluid flow.
It requires the movement of atoms and molecules within fluids (liquids or gases).
In a solid, atoms and molecule are fixed in place and the material of a solid does not flow, so there can be no convection.
Note 1.
The answer above directly applies to 99.9% of the cases. There are peculiar amorphous materials, such as elastic materials, where one might consider them solid but they undergo some movement. There are also "visco-elastic" materials which exhibit both elasticity and flow. (For example below Earth's tectonic plates is the visco-elastic asthenosphere. Some artificial polymers and foams will behave partly as fluids and partly as elastic solids.) True solids do not flow.
Note 2.
There are links below related questions on why there is no heat transfer by convection in solids and why there is convection in fluids.
Convection in solid materials can occur due to temperature gradients within the material. As a solid material heats up, the particles gain energy and move more rapidly, creating local areas of higher temperature and lower density. This leads to the movement of particles as hotter, less dense regions rise and cooler, denser regions sink, transferring heat through the material.
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 occurs in fluids like liquids and gases, not in solids. In convection, fluids move due to temperature differences causing density variations; this movement transfers heat from one place to another. Solid objects do not move in convection because they do not flow like fluids do.
Convection occurs in all states of water - solid, liquid, and gas. In liquid water, convection is responsible for the movement of heat and energy through the water. In the atmosphere, convection plays a key role in cloud formation and weather patterns.
Heat conduction is the transfer of heat through a material by direct contact between particles, while convection is the transfer of heat through the movement of fluids or gases. In conduction, heat is transferred through a solid material, while in convection, heat is transferred through the movement of a fluid or gas.
Convection currents can occur in either a gas or liquid medium but not in a solid medium (so you can have them in air, and you can have them in magma, but you can't have them in solid rock) and they only occur when there is a temperature difference, so that hotter, less dense material will rise, and colder, denser material will sink.
Convection in solid materials can occur due to temperature gradients within the material. As a solid material heats up, the particles gain energy and move more rapidly, creating local areas of higher temperature and lower density. This leads to the movement of particles as hotter, less dense regions rise and cooler, denser regions sink, transferring heat through the material.
Resonance can occur in any solid material where the frequency of oscillation in the material is equal to the natural frequency of the material.
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 occurs in fluids like liquids and gases, not in solids. In convection, fluids move due to temperature differences causing density variations; this movement transfers heat from one place to another. Solid objects do not move in convection because they do not flow like fluids do.
Convection currents are circular movements of fluid driven by temperature differences. In Earth's mantle, convection currents occur in the asthenosphere, which is the semi-solid layer beneath the lithosphere. These currents play a significant role in plate tectonics and the movement of Earth's crustal plates.
Convection occurs in the Earth's mantle, specifically in the asthenosphere. This is a layer of partially molten rock that lies just below the solid upper mantle. Heat from the core causes material in the asthenosphere to rise, cool, and then sink back down in a continuous cycle, driving the movement of tectonic plates.
Convection occurs in all states of water - solid, liquid, and gas. In liquid water, convection is responsible for the movement of heat and energy through the water. In the atmosphere, convection plays a key role in cloud formation and weather patterns.
Under conditions of standard temperature and pressure convection is not possible in the solid state of matter.However under extreme conditions (e.g. the high temperature and pressure in the earth's mantle) convection is not only possible in the solid state of matter, but happens all the time just as in the liquid and gas states of matter but much slower.
Convection in any fluid will occur when the lower portion is warmer than the upper portion. The less dense warm material will tend to rise while the denser cooler material will tend to sink. While the mantle is generally though of as solid, even solids can behave as viscous liquids over millions of years.
Heat conduction is the transfer of heat through a material by direct contact between particles, while convection is the transfer of heat through the movement of fluids or gases. In conduction, heat is transferred through a solid material, while in convection, heat is transferred through the movement of a fluid or gas.
move and transfer heat through bulk motion like gases and liquids. Heat conduction is the primary mode of heat transfer in solids, where energy is transferred through the vibration and collision of atoms and molecules within the solid material.