2nd grade project on scale... please help!

Ask questions about projects relating to: aerodynamics or hydrodynamics, astronomy, chemistry, electricity, electronics, physics, or engineering

Moderators: MelissaB, kgudger, Ray Trent, Moderators

2nd grade project on scale... please help!

Postby _sharon » Sun Apr 17, 2011 5:29 am

I went through the ScienceBuddies site with my 8yo son and the project that appealed to him was the one on scale that was not a full project. :?

Like many boys his age he loves models, science and math. He builds scale hobby cars, flix trix bikes, rockets etc. He has learned that models of airplanes/rockets and houses save money, are easier to make design changes, and save lives.

He has been busy learning about why scale is important and what it is. He has determined by sight, not measuring, that his 3 inch flix trix bike is too big to look realistic next to his 1:24 scale car then measured to see why: the scales were different.

He also made a model without regard to scale and one with regard to scale to see which one was more realistic. The original question was: How can I make my models look realistic?

HOWEVER, he doesn't love the fact that his models are not really science and I know what he means - he wants to make a model and test it... but what kind of model can an 8yo actually test so he can compare it to the full size object??

We have tried to come up with another question/hypothesis that he can build or test within the next few weeks but they are just not quite what he's looking for.

Some questions:
Does it make a difference if my model is built to scale? The answer was yes if the difference was "Does the model look realistic?", BUT he wants to TEST if there is a difference if the model is built to scale by making a model then making the object. What is realistic for a boy to make?

Is it really easier to test a model than a full size object?
Is a model as accurate as a full size object?

So, I'm really looking to guide him in building something to test but he is stuck because he is thinking rockets, airplanes and nuclear weapons (lol) and I'm not much help to him.

Thank you!
Sharon
_sharon
 
Posts: 2
Joined: Sun Apr 17, 2011 4:01 am
Occupation: parent
Project Question: n/a
Project Due Date: na/
Project Status: Not applicable

Re: 2nd grade project on scale... please help!

Postby _sharon » Mon Apr 18, 2011 8:26 am

Anyone?

I just need a little bit of help in getting his project focused.

Thanks
_sharon
 
Posts: 2
Joined: Sun Apr 17, 2011 4:01 am
Occupation: parent
Project Question: n/a
Project Due Date: na/
Project Status: Not applicable

Re: 2nd grade project on scale... please help!

Postby kgudger » Mon Apr 18, 2011 1:51 pm

Hello and welcome to the forums!

Wow! This is a great bunch of questions, but as they're so open ended, I'm not sure how much help I can be. First, please note that your son does not necessarily have to build the "to scale" object - you can get all kinds of data about real world objects and compare that data to the results of the testing on your model. For instance, you don't have to build an airplane to test :D you can get data on a particular airplane / wing shape on the Internet and compare to your testing on a to scale wing.

I found a couple of articles that discuss the importance of using models in science: http://wiki.answers.com/Q/What_are_the_limitations_of_a_scientific_model and http://www.learner.org/courses/essential/physicalsci/session2/closer1.html.

Since your son is interested in bicycles, I wonder if he would be interested in testing various theories on a bicycle model, then trying them out on a real bicycle? Maybe something to do with balance? I saw this article recently about bicycle balance, maybe it will give you some ideas? http://news.sciencemag.org/sciencenow/2011/04/how-to-keep-a-riderless-bike-fro.html?ref=hp

Please check back in and let us know what you decide! Thanks!
Keith
kgudger
Moderator
 
Posts: 412
Joined: Wed Sep 17, 2008 9:20 pm
Occupation: electronic engineer
Project Question: n/a
Project Due Date: n/a
Project Status: Not applicable


Return to Grades K-5: Physical Science

Who is online

Users browsing this forum: No registered users and 4 guests