Which best describes convection?

it relies on the collision of particles within or between substances.
it occurs in solids, liquids, or gases that are heated.
it results when portions of a liquid cool and rise.
it is driven by temperature differences within a fluid.

The correct answer is "It is driven by temperature differences within a fluid".

Explanation:

Convection: It is a process in which there is movement of the mass take place on heating. On heating, the fluids such as liquid or air travels away from the source. The heat above the hot surface expands and become less dense and rise. There is a temperature differences within the fluids.

Consider the example of burning fire. On the top of the burning fire, there is convection due to the movement of hot air.

Therefore, convection is driven by the temperature differences within a fluid.

The correct answer is "It is driven by temperature differences within a fluid".

Explanation:

Convection: It is a process in which there is movement of the mass take place on heating. On heating, the fluids such as liquid or air travels away from the source. The heat above the hot surface expands and become less dense and rise. There is a temperature differences within the fluids.

Consider the example of burning fire. On the top of the burning fire, there is convection due to the movement of hot air.

Therefore, convection is driven by the temperature differences within a fluid.

It is driven by temperature differences within a fluid.

It is driven by temperature differences within a fluid.

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