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LIGHTS
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BY: BOBBY AND TUAN
LIGHTS
BULBS
We wanted to see how long can we make our iron filament glows.
We chose this topic because we wanted to know more about electricity, electric current and filaments.
Our problems is to see how long we can make our iron filaments glows. Our hypothesis to our problems is that we think that three strands of iron filaments would last the longest.
Our materials are: one small jar, a cork stopper, three feet of shielded copper wire, one b-volt battery but not a car battery, and some thin iron wire. Our procedure is first cut the copper wire into two lengths about 1 (1/2) feet long. Cut off an inch of the shielded copper wire (the shielding) at each end of the two strands. Second, with a nail, drill two holes into the cork. Push the wire through the holes in the cork so that about two inches of wire can be seen in the jar. Next, make a hook at the end of the copper wires so that you can twist small strands of iron wire around them to make a filament. Forth, twist several strands of iron wire together and stretch them across the gap between the two copper hook to form the filaments. Fifth, put cork stopper with filaments inside the jar. Sixth, carefully hook up both copper wire ends to the battery and watch your bulb light up!
Our results were that 2 strands of iron filaments lasted the longest but it did not glowed very well.
Our conclusion is that our hypothesis is wrong, our experiments prove to us that 2 strands of iron filaments had lasted the longest. For our application, we think this might help the world by people having a light shortages and could use this experiments to get some light if they have no other possible resources for other lighting.
The easiest part of Science Fair is putting everything on the backboard. The hardest part was presenting our project to the judges. A discovery that happened while doing our Science Fair is that the filament could get really hot from our experiences.
We think we did pretty well on our Science Fair topic. We could improve our project by have more background information on our project, by trying to have no air escaping and entering the jar while experimenting and to present our project in a better way.
The Science Fair could be improved in our opinion is that it could be extended until march 22/2001, to have nicer judges so that we feel more comfortable instead of being nervous and based on the knowledge we can handle not like grade 11 things.
The most important thing we learned is to start your project earlier and to have a more interest in the topic you are doing.
Links
Why do halogen light bulb last longer?
Changing Light Bulbs on the internet