Dirty, old pennies would become cleaner when they are washed with the solution of vinegar and salt.
Vinegar Salt Dirty, old pennies Plastic bottle Water Paper towel
1. Put vinegar and salt into the bottle and mix them well.2. Put pennies into the bottle.3. Shake the bottle for few minutes.4. Take the pennies out and rinse them with water.5. Rub the pennies with paper towel.
Salt is nacl. When salt and vinegar are mixed, vinegar separates nacl into na and cl. And cl has the ability to clean metalic things. So when pennies are washed with the solution of vinegar and salt, they become cleaner. Also acid in coke can clean pennies.
When an egg is When vinegar and The acid in vinegarintroduced to vinegar, baking soda are dissolves the bone.the vinegar dissolves mixed, they give out After few days inthe egg shell, and the CO2. With this CO2 vinegar, bone becomesegg becomes more we can blow a balloon. flexible enough to beflexible. bent.
Google Science Fair:The Google Science Fair is an online science competition sponsored by Google, Lego, CERN, National Geographic and Scientific American. It was announced in January 2011; all entries were due at 11:59:59 pm Eastern Daylight Time on April 7, 2011 and judging occurred in July 2011. The competition is open to 13–18 year old students around the globe, who formulate a hypothesis, perform an experiment, and present their results. The world’s science fair converges on Vancouver