Science Buddies: "Ask an Expert"

I already bought all of the materials for this poject, but for our science fair we have to have variables. When I say variables, I mean like using more than one thing and comparing them like which one's the strongest, etc. I don't really have an idea of what to do on this project. Can someone help me!!!

Hi smarti,

One of the variables is suggested in the writeup of the experiment, i.e. you can use one or two batteries. So what are the measured outputs with one battery vs. measured outputs with two batteries.

Someone did this very similar thing before. See below:
http://www.energyquest.ca.gov/projects/lightning.html

Hi smarti,

Aah, it's all there in the project write-up:

https://www.sciencebuddies.org/mentorin ... php?t=2196

If you find the text:

In this project there are a number of variables you could choose to investigate, for example:

there are five bullet points with five variables to use. Please excuse if you've found already.

thanx!