How about the effect of tread on traction? He could compare a slick tire to one with a tread, maybe in wet and dry conditions. There are different ways you could measure "traction", some methods wouldn't even require riding a bike. The challenging part would be for him to define what he meant by traction, and devise a way to measure it.
On the other hand, at the grade six level maybe you should just let him come up with the question, no matter how simple it is? My son has done these kinds of projects, I had lots of ideas of my own but I let him think of what he wanted to test, then asked him questions about how he would do it. He was happy to do the project that way, because it was his own idea. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To view this discussion on the web visit https://groups.google.com/d/msg/rbw-owners-bunch/-/fQJCEO9axpYJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
