Well my physics teacher did this cool thing where he taped a plastic bag to all of these straws with birthday candles glued to them and then lit the candles and the bag was just like a hot air balloon...I'm sure it would be a big hit!
2006-10-30 10:34:12
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answer #1
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answered by Anonymous
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Volcanos that spew a mix of baking soda and vinegar are classics, if not a bit overdone. You can also use coffee filters to break down the inks in things like markers and pen ink to separate out the various dyes that were combined to create the color. You put the marks along the outside edge of the filter, and then use drips of water on them for the filter to absorb. As the water is pulled into the filter, it will pull along the ink and it breaks up into the different colors- the green will break down into blue and yellow, for instance. The blacks and browns are always neat to watch, they will break down into greens and purples to start.
You can also grow borax crystals or salt crystals. A web search will turn up the directions. The salt crystals are usually done with bluing, and there are directions through a place called Mrs. Stewart's Bluing. Along those lines, you can grow colored sugar crystals on sticks, using regular sugar and food color- but that can take a week or more to do. I've done the borax with my kids, using the 40 Mule Team borax powder from the store. Just mix it into hot water until you can't mix in anymore. Then you can suspend a string or stick, or even a wire shape in the mixture and the crystals begin to form almost immediately. By next morning they are huge. But then you need to be careful, as they can be really fragile.
Other things we did at this level were to plant dried beans along the sides of a glass jar, in different positions, and cover the outside with dark paper. Then you watch them germinate and sprout, and see which bean sprout breaks the surface first. You can keep an eye on the process by taking off the paper each day, and then taping it back on. It actually does make a difference, which way the bean is planted- though they will all eventually break through.
If you want other ideas, do a search through Yahoo Kids, for science fair project ideas. There are plenty out there. The one's I gave are some of the simpliest, but there are others. Good luck!
2006-10-30 18:45:23
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answer #2
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answered by The mom 7
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In fourth grade I did a science fair project on electricity. I had doorbell buttons that acted as my switch and a light bulb that lit up when the button was pushed on the different types of circuits. I used the kind of battery that had the spiral looking posts to power it.
2006-10-30 18:45:46
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answer #3
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answered by alicia0821 3
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http://www.scienceproject.com/projects/index/primary.asp
i would recommened 15 and 17 they us what you choose
2006-10-30 18:47:29
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answer #4
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answered by Stephanie 4
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