Need it please. as bad as needing to go to the bathroom when your sister's in there for five hours.
2007-01-12 06:24:44 · 7 answers · asked by Knowledge Seeker 2 in Education & Reference ➔ Homework Help
It needs to able to be done by a 7th grader.
2007-01-12 09:59:18 · update #1
Show how acids effects calcium by placing an egg in container with lids. Put egg in vinegar, Coke, Orange juice, and peroxide then time how long it takes for the shell to dissolve. write down how long it took for each and show the egg's container and leave the egg on a plate be careful egg doesn't pop. then show a new egg in the vinegar, Coke, Orange juice, and peroxide at the science fair. so people can see how you did it.
2007-01-20 05:14:39 · answer #1 · answered by Earth to Mars 5 · 0⤊ 0⤋
Show the difference between potential and kinetic energy.
I took two foam-like paper plates (cuz they're sturdy) and taped a toilet paper roll in the middle of the plates so that it looked like a wheel. Next, take a rubber band and put it through the middle of the plates (in a small hole, big enough to thread the band so that it sticks out of each hole, going THROUGH the toilet paper roll). Secure one end of the rubber band with a paper clip to the outside part of the plate so that it doesn't move. Tape the paper clip down to the plate. At the other end, take another large paper clip and secure that to the rubber band. This is going to be your "winder." To show potential energy, wind up the rubber band enough so that when you go to show kinetic energy all you have to do is set the wheels on the floor and let the thing go. It will roll by itself due to the tightly twisted rubber band that is inside it. The tightness of the rubber band is potential energy and the actual movement is kinetic.
It's lame, but it's easy and works. There is little research and materials needed.
2007-01-12 06:39:34 · answer #2 · answered by madjennyvane 3 · 2⤊ 0⤋
Build A Kirlian Kamera. Thats Not Fast. But Interesting!
2007-01-12 06:33:11 · answer #3 · answered by Otilio Guerra 1 · 0⤊ 1⤋
This is a personal fav. Put a handful of raisins in an air tight container with water and an alkaseltzer. The raisins will "dance."
This is due to the oxygen bonding to th raisins. Make a nice back board and there ya go.
2007-01-12 06:39:19 · answer #4 · answered by Anonymous · 2⤊ 0⤋
it relatively is a sturdy venture thought, (regardless of if I dont understand if it classifies as a "time-honored", it is Aeronautics) If weight is hooked as much as a paper plane, Does it relatively is Distance of the flight substitute?
2016-12-13 04:03:09 · answer #5 · answered by ? 4 · 0⤊ 0⤋
You can do a model of the solar system. Minus Pluto of course.
2007-01-12 06:33:03 · answer #6 · answered by freeballn83 2 · 0⤊ 1⤋
Umm well there is the simplist one in a volcano
you can use percentages as in if you like basketball and you can desenagrate snails ummm you can show bone defects rockets and bombs
2007-01-12 06:31:50 · answer #7 · answered by Smileyz55 1 · 0⤊ 2⤋