In this experiment, a hard-boiled egg is pushed into a bottle (preferably a 2-liter bottle or one with a similar opening size) without even touching it. First a 3-inch by 3-inch piece of newspaper is lit with a match. The ignited paper is then placed inside the bottle. Just as the flame is about to go out, the egg is set on the mouth of the bottle. Due to the expanding air pressure caused by the burning paper's heat, the egg should then slip into the bottle effortlessly. When the egg is placed on top of the bottle, it seals the bottle, and the fire soon goes out. Then the air inside cools and contracts, and the pressure of the air inside the bottle becomes less than the pressure outside. The higher pressure outside then pushes the egg into the bottle.
Static electricity, a type of electricity produced by atoms, has the capability to move objects, make hair stand on end, and even shock people. One experiment involving static electricity enables home scientists to bend water by using static. In this experiment, a nylon comb is run through a human's hair and then placed under a light stream of water. As the water drips over the comb, the water begins to bend from the static charge. The charge on the comb pulls the molecules of water in the stream. The molecules in the stream are weak and can be moved easily, so the stream bends toward the comb.
This experiment involves studying the effects and usage of carbon dioxide gas, soda, and raisins when mixed together. The process begins by placing 6 or 7 raisins in a tall glass of soda. As they are dropped into the glass, they begin to settle at the bottom of the glass. This is because the raisins are more dense than the soda. As the carbon dioxide bubbles stick to the raisins, however, the raisins become lighter and more buoyant. This causes the raisins to first rise and sink sporadically, then rise to the top of the glass. Once the raisins have risen to the top, the bubble pop and release the carbon dioxide gas into the air. This, in turn, causes the raisins to lose their buoyancy and sink back to the bottom of the glass.