Convection
Published on Nov 22, 2015
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PRESENTATION OUTLINE
Convection- is the circular motion that happens when warmer air or liquid — which has faster moving molecules, making it less dense — rises, while the cooler air or liquid drops down.
Why does convection happen?
When molecules are heated they move upward.while the cooler molecules move downward creating a circular motion.
ancient civilizations discovered that convection occurred on a large scale from the sun and stars and affects our atmosphere, ocean currents and the earth's crust.
Photo by archer10 (Dennis)
However, Isaac Newton was the first to design a formula for convection
For example,Boiling water,
the heat travels through the burner into the pot,heating the water at the bottom. Then, the hot molecules rise, while the cooler molecules move to the bottom creating a circular movement.
Photo by JohnathanLobel
Radiator - Puts warm air out at the top and draws in cooler air at the bottom.
Photo by alex.ragone
Steaming cup of tea is also an example. The stream shows heat converting into air.
Ice thawing is an example of convection because Heat moves the ice from your hand or to the air.
Photo by Piero...
