Bubbles-+Sarah

__Bubbles__

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= History = Bubbles were first popular in the 18th and 19th centuries, when mothers gave their children extra soap bubbles from washing dishes. Later, at the beginning of the 20th century, street venders sold bubbles as a toy. Then in the 1940's Chemtoy, a chemical company started selling bottled bubble solution. Tootsietoy Company also sold bubble solution. In the 1960's, bubbles were seen as a symbol of peace. In the 1970's onward, bubbles were sold more frequently, and today they are the best selling toy in the world.

Chemistry
Bubbles are round pockets of air or gases in liquid, like boiling water or soda. They are also found in solid objects such as plastic or glass. When water boils in a pot, there are little bubbles that start to form. This happens because when water gets to 100 degrees C, it starts to turn into water vapor, or gas. The water vapor pressure must be equal to the atmospheric pressure. A regular boiling point is the the boiling point of the liquid at 1 atmosphere, or the vapor pressure at 1 atmosphere. When boiling water in a pot, the bottom of the pot gets hot first, and the water vapor forms the bubbles. The bubbles are O2 and CO2.

Importance
Bubbles are important because they are what enables boiling water. They create little pockets of air that turn into water vapor, allowing the water to boil. Bubbles are also fun and create lots of activities for kids.





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Make your own bubbles!
What You Need: Directions:
 * 1/2 cup dishwashing liquid
 * 4-1/2 cup water
 * 4 tablespoons glycerine
 * container with lid
 * 1) Gently mix 1/2 cup (500 mL) liquid dishwater detergent, 4-1/2 cups (4.5 L) water, and 4 tablespoons glycerin (60 mL) in container.
 * 2) Foam may be skimmed from the top before use.
 * 3) Have fun!