Observing Convention

Aim: To observe convention in a gas.

Equipment: Scissors, Paper spiral pattern, String, Sorce of heat.

Method
1.Cut out the spiral pattern below, Carefully following the dashed line.
2.Tie a length of cotton through the hole on the top of the spiral.
3.Hold the spiral 30-40  cm above the hole on the top of the spiral.
4.Observe.

Observation: I watched as the spiral went around and around with the heat of the flame from the gas.