1. JungEun Choi (Aileen)
11th

2.  Dirty, old pennies would become cleaner when they
are washed with the solution of vinegar and salt.

3.  Vinegar
 Salt
 Dirty, old pennies
 Plastic bottle
 Water
 Paper towel

4. 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.

5.  The pennies became cleaner than before.

6.  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.

7. When an egg is When vinegar and The acid in vinegar
introduced to vinegar, baking soda are dissolves the bone.
the vinegar dissolves mixed, they give out After few days in
the egg shell, and the CO2. With this CO2 vinegar, bone becomes
egg becomes more we can blow a balloon. flexible enough to be
flexible.
bent.

8.  Google Science Fair:
The Google Science Fair is an online science competition sponsored by
Google, Lego, CERN, National Geographic and Scientific
American.[1][2][3] 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