## What is a convection spiral?

Heating air causes the air molecules to travel farther apart, thereby making the air less dense. Less dense air will always rise above dense air. As the warm, lighter, air rises upwards the paper spiral begins to spin. This forms a strong convection current of warm moist air moving upwards, known as an updraft.

## What causes a spiral of foil to turn when a candle is lit under it?

Everyone knows that hot air rises. The candle flame produces a current of hot air. As this hot air rises, it makes the spiral rotate.

How does the spinning snake work?

The rising hot air makes the snake spin because of the shape of the spiral. Just like in a pinwheel, the air gives the snake a push in one direction and starts it spinning. In a frictionless world, the snake would keep spinning forever (or, at least until the candle burned out).

### Do snakes use convection?

This circular movement of air particles rises and falling causes the snake to spin. We call it a convection current. This is replaced by cooler more dense air which is then heated!

### What is a heat spinner?

convection heat spinner 1 is a simple merry-on-round which is powered by heat energy. The air above the flame absorbed the heat from the candle and expanded. The expanded air became less dense than the surrounding air and hence rose. This hot air pushed the propeller above and caused the propeller to spin.

How does a convection snake work?

Convection is the transfer of heat in a fluid. A fluid is usually a liquid or a gas! In the case of the snake it is the air molecules that are being moved. This circular movement of air particles rises and falling causes the snake to spin.

## What causes a convection current in a snake?

This makes the gas (or air) less dense and so it rises being replaced by cooler more dense molecules. The molecules as they rise lose heat, come back close together (increasing density) and sink again and the cycle continues. This circular movement of air particles rises and falling causes the snake to spin. We call it a convection current.

## How is convection produced in a hot plate?

The hot plate produces a current of hot air. As the air rises, the convection produced causes the vanes or spinner to turn. Set up another example of convection by folding a piece of tissue paper in half widthwise, then in half widthwise again. Create a prism out of the paper.

How to make a paper spinner at home?

Lay cloth and a piece of glass on the snow or colored paper and glass on the pavement at least an hour before the lesson. Plug in the hot plate. Heat a cup of water to almost boiling. Set up the candle spinner or create the paper spinner.

### Are there any convection ovens left in stock?

Only 14 left in stock – order soon. . Hauswirt 42Qt Countertop Oven, 8-IN-1 Dehydrator Convection Bake Oven With Upper and Lower Heat Control, Hot Air Fan For Pizza, Cake, Ferment, Dehydrate Fruit, Roast, Rotisserie – Retro Blue . . Only 2 left in stock (more on the way).