(liquids or gases)
Convection
-is the main mode of heat transfer for both liquid and gas only.
-involves the movement of hotter fluids from the hot region to the cool region.
-cannot happen in solids as it needs particles to be free to move about.
How does convection work?
-As the water at the bottom of the flask get heated up, the molecules at the bottom move about with bigger vibration, expands and take up more space.
-As it expands, it's density will increase thus it will rise.
-But with this, the cooler water in the upper part of the flask becomes denser and will sink.
-As it sink, it gets heated up.
-This movement of less dense warm water rising and denser cool water sink form the convection current.
-And this this pattern will keep continuing.
This are some examples of convection experiments.
'Eureka' in convection.
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