How is the water in a kettle heated?

I was given the homework today to describe how water in a kettle is heated, (we've been doing conduction, convection and radiation)
The this is I don't really know and I have been looking all over the internet to find our how so I thought I'd ask here......

If anyone could explain to me how that would be great, by the way I have to use the term convection current so if you could put it in that would be great. I doesn't have to be an essay, he said just 50-100 words

If anyone has a really good one I might add to your rep.......xx Thank you

Magnets man, its like ******* magic.

the heater in the kettle heats the water just above it. this water becomes less dense and therefore moves to the top of the kettle, becuase this has moved to the top, the cold water that used to be at the top has moved to just above the heater. this water now heats, becomes less dense, moves to the top, and the water that used to be at the top moves back, this continues and continues until the water gets to boiling point. that help?

Sorry late reply. It is indeed. The same thing happens with air above a radiator or water in saucepan etc etc

when the kettle is heated up,Liquids and gases expand when they are heated. This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume. This is because the gap between particles widens, while the particles themselves stay the same size.The liquid or gas in hot areas is less dense than the liquid or gas in cold areas, so it rises into the cold areas. The denser cold liquid or gas falls into the warm areas. In this way, convection currents that transfer heat from place to place are set up.

Ok. Are you a chemical engineer?

Why do less dense materials rise up above more dense materials?

What makes the particles climb?

This thread is over 7 years old!!