The following activity is to be performed only by a qualified science educator observing safe and prudent laboratory practices in a laboratory equipped with all the necessary safety apparatus. Remember, safety always comes first. Preparation Use the scissors to cut straight across the top of the tea bag, just under staple. Unfold the bag and empty its contents into the trash.
Procedure Put on the safety glasses or goggles.
Stand the tea bag on the heat and fire resistant surface with its open end down. Use the lighter to light it at the top. The small amount of charred tea bag remaining can be disposed of in the trash. Air currents generated by heat are called convection currents. Convection currents form because of the difference in density between hot and cold air.