Convection as a form of heat transfer occurs whenever something is hotter than the air around it.
An example might be a stove-top that has been turned on or asphalt in the sun.
Materials that allow convection to take place are usually fluids or gases, as they can easily move and transfer heat through the process of convection. Solids can also participate in convection to a lesser extent, especially if they have some degree of flexibility or ability to transmit heat through them. In general, materials that can move or flow are more likely to enable convection.
water/gasses
Conduction and convection require a medium, such as solids or fluids, to transfer heat through direct contact or movement. Radiation, on the other hand, can occur in a vacuum or through empty space as electromagnetic waves. So, for conduction and convection to take place but not radiation, a medium for heat transfer is necessary.
Convection requires the movement of a fluid medium to transfer heat. Since solids do not have the ability to flow like liquids or gases, convection of current cannot take place in solids when they are heated. Heat can still be transferred through conduction in solids, where it is transferred from one molecule to another through direct contact.
An example of conduction is when a metal spoon in a hot drink gets hot at the handle end. An example of convection is when warmer air rises, causing cooler air to move in and take its place, creating a convection current.
Sunflowers
Convection
convection takas place wen iron piece is heated
Convection takes place because cool air is less dense than warm air.
No
yes it can.
athenosphere and lithosphere
idkk,
liquid and gas
cold air is less dense
convection
Catalysts are used in everyday life to speed up chemical reactions in processes such as catalytic converters in cars to reduce emissions, in industrial chemical production to increase efficiency, in food production to enhance flavor and texture, and in the pharmaceutical industry to synthesize drugs.