In this fun-filled experiment, make a gun out of soda bottle.
Things Required:
Soda bottle
Petroleum jelly
1/2 package dry yeast
1 teaspoonful of sugar cork that fits the soda bottle
Directions:
Pour 1/2 package of yeast into the soda bottle. Fill the bottle one-half full with warm water. Add 1 teaspoonful of sugar. Place your thumb over the mouth of the bottle and shake the bottle vigorously to mix the contents. Cover the sides of the cork with petroleum jelly. Loosely stopper the bottle with the cork. Place the bottle on the ground.
This Is What Happens:
After a few minutes the cork pops out of the bottle and into the air.
Science Behind It:
Yeast contains tiny plants that use sugar and oxygen to produce energy. As this energy is produced carbon dioxide is also formed. As the amount of carbon dioxide gas increases inside the closed bottle, the pressure of the gas builds. When enough gas is formed, the cork will be pushed out with enough force to produce a popping noise.
