Convection Flashcards
1
Q
What is convection?
A
Convection is the transfer of thermal energy by the movement of heated particles of liquids and sometimes gases.
2
Q
How does convection work?
A
Convection occurs when heated particles rise up and take the place of cooler particles. These cooler particles then sink and this repeats. This happens in a circular motion.
3
Q
Why do heated particles rise?
A
They are less dense than cooler particles
4
Q
Why do cooler particles sink?
A
They are more dense.
5
Q
Why does there need to be a heat source for convection?
A
The cooler particles have to be warmed again so they rise to keep a flow of particles going round.
6
Q
Why doesn’t convection happen in solids?
A
Because the particles can’t move freely in solids.
