I propose we ..... put a needle through a balloon (without popping the balloon)

Links:

1.http://scifun.chem.wisc.edu/homeexpts/needle.htm
2.http://scifun.chem.wisc.edu/homeexpts/homeexpts.html

Materials:

• balloons


• long wooden or metal skewers


• pertoleum jelly a sharp pin


• cellophane tape

Procedure

1. Blow up a balloon and tie it close.


2. Take the skewers and dip the tip in the petroleum jelly, spread the rest of the jelly on the skewers.


3. Carefully take the skewer and push it gently through the balloon.


4. Push the skewer through the top and gnetly through the knot of the balloon.


5. With the skewer push it through in a twist motion.

Saftey Precautions:

• Be careful not the poke yourself with the skewers.

Scientific Principles:

The reason why the balloon pops with no petroleum jelly is because it breaks the long polymer chains in the rubber. The molecules in the balloon consist of cross linked polymers. When the tension on the cross-links is too much, the cross-links will break and pull-apart.

CAHSEE scores

I was so excited that i passed the High school exit exam! Though i did ok, i passed the test with a over average score. The test went ok and my parents are very happy with my scores. I received a 395 on the English portions and a 404 on the algebra portion. Its not great but at least i passed!!!!

spring break

My break was super fun! I went surfing in SD and that was an awesome experience. We also went to sea world. That was also fun too. I wish that i could live in San Diego with my Aunt's family. We also went to Bucca Di Beppo and sat at the Kitchen's table. That was so FUN. We even got free food, since some of them were mistake orders. It was all really good Italian food. The last day we went to P.F Chang's and had Gourmet Chinese food. As my first time there i had iced tea and we shared the food. It was Ok, in my opinion.