I need a science experiment?

well im in 8th grade and in Gifted/Talented Science. I need a topic that is CHALLENGING to get an "A", and not very common. my teacher didn't like the one i presented because it has been done a lot. It can't involve plants or living things other than humans. any ideas? thanks :]











um and also i can't just research something or explain how some thing works i have to do an ***experiment, and the data can't be too subjective.





oh yeah and this project determines whether my teacher is going to recomment me for GT science in high school so it has to be impressive.

I need a science experiment?
Maybe you will like this Physics one.


Attach a felt pen to a piece of steel ribbon about 1.5 wide and 15 cm long (those used to wrap around pallets or boxes), and fix the ribbon to a block of wood, so that the felt pen will oscillate horizontally when pulled sideways.


Find a roll of calculator paper, wider than the oscillations of the felt pen, and attach it to the surface of an inclined plane.


Start the oscillation and release the wooden block from the top of the plane, so that the felt pen will mark a damping oscillation on the paper when sliding down.


Now, although the amplitude of the oscillations will decrease, the period of the oscillations is a constant.


Because of the acceleration, the lenght traveled during each oscillation period (period = a full sinusoid) will increase, and the differences between two far apart oscillations will allow you to calculate the component along the plane of gravity acceleration.


By tilting the plane at different angles, you can achieve that the block slides at constant speed (acceleration = 0) when the friction compensates the component of gravity acceleration parallel to the tilted surface.


Or:


You can also do it the other way around, it is, attaching the roll to the upper part of the tilted surface and attaching the paper to the wood block, so that it pulls the paper when sliding. In this way the vibrating element with the pen could be fixed at the top of the plane instead of the block. This setting makes it easier to retrieve samples of marked roll paper each time the experiment is repeated.


I hope to have helped you.



hairstyles hair style