School Supply Experiments
with Sci-Tech Discovery Center Now that you have all of the supplies you need to begin another school year, let’s try some experiments with those supplies to impress all of your friends and new teachers!
WALK THROUGH PAPER! Materials:
One Lined Index Card or White Paper Scissors
Procedure:
There are two ways to do this activity. If you are going to use a piece of white printer paper, either follow or print out the template on pg. 61. Then fold your paper in half length wise – “Hot Dog” style. Now, cut on the solid lines. Be sure to cut the solid line down the fold of the paper too (Make sure to notice that the solid line on the folded edge does not go down the entire edge!). Now, separate the paper and expand it into one large connected circle!
BROKEN PENCIL Materials:
One pencil Glass Jar Water
60 North Texas Kids • August 2011 •
www.NorthTexasKids.com
Fill your glass jar ¾ full with water. You will want to use a glass container that you are able to see through clearly. Put the pencil halfway into the water at a slanted position. Look through the glass container at the water line. Does the pencil look the same? It should look like it’s broken, bent, or the bottom and top halves of the pencil may look like they have completely separated. This is a great scientific trick to show your friends.
The Science: Light travels at different speeds through different
substances. Because we are seeing the top of the pencil through air and the bottom of the pencil through water, the light around it is moving at different speeds. Basically, the water is denser and can “bend” light. We call this process refraction, the bending of a ray when it passes at an angle from one medium into another in which its speed is different (as when light passes from air into water).
***Try positioning the pencil differently in the water to see if anything changes to the position of the part of the pencil in the water.***
continued on page 61
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