observing convection 11

AIM to observe convection in a gas.

EQUIPMENT  scissors,paper spiral  pattern, string, source of heat boiling water, radiator.

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 a heat source such as a radiator

4.  observe.


OBSERVATIONS

the paper spiral stare to tern around.

EXPLANATION

the gas expand it rises and when to the happens.  this is called convection.