The process of convection occurs when there are significant differences in density, pressure or temperatures of two - or more - different layers of matter in liquid, gas, solid or plasma state.
convection
Convection refers to the transfer of heat energy by the motion of a fluid such as air or water caused by differences in temperature within the fluid. Therefore convection happens wherever there is a fluid with a temperature gradient. This means that convection is happening continuously in the air around us and in bodies of water. A car heater and a convection oven are also considered to transfer heat by convection, but this is using the term liberally since the movement of the fluid (air) in these two cases is caused by a fan, not temperature gradient. So, while not perhaps being absolutely accurate examples of convection, still the heat is transferred through fluid motion.
The three factors that set convection currents in motion are: the heating and cooling of fluid, the change in it's density, and the force of gravity.
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Convectional kitchens typically feature appliances that use convection heat to cook food evenly and efficiently. Common examples include convection ovens, which circulate hot air for uniform cooking; convection microwaves, which combine microwave energy with convection heat; and air fryers, which use rapid air circulation to achieve crispy textures. These appliances enhance cooking performance by reducing cooking times and promoting even browning.
A convection current, however, this can also occur with gases.
Convection
Convection currents are in the liquid and gas states.
mantle
Convection occurs mainly in the gaseous state, where heat is transferred through currents in air. Convection can also occur in liquids, however it is generally identified with gases.gas and liquid
Convection is most likely to occur in fluids, such as liquids or gases, due to the movement of their particles. Additionally, convection can also occur in certain solids that are capable of flowing, such as molten lava or heated metals.
They occur when the convection currents are less dense and rise.
When smoke goes up through a tube to a container and into fire.
Convection currents occur in the mantle, which is the middle layer of the Earth. The heat generated from the core causes the molten rock in the mantle to move in a circular pattern, creating convection currents.
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The mantle.
Convection occurs in any liquid or gas that has variations in density due to uneven heating.