Procedure

A procedure should be easy to follow.  It should have step-by-step directions for conducting the experiment.  Often it includes a sketch of how to set-up the experiment.  The directions may be numbered to be sure they are done in the correct order.
Here’s an example using the ice cube experiment.

Put two identical bowls on the counter.
Take [...]

Hot Air Eggsperiment

Materials

one peeled, hard-boiled egg
plastic or glass bottle with an opening, slightly smaller than the egg
two large bowls, one filled with hot water and one filled with ice cold water

Directions

Put the bottle in the bowl of hot water [...]