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  #1  
Old 03-17-2006, 10:14 AM
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Default Need Help!

Ok, so I need some ideas for my science fair project.
I'm in seventh grade, learning about the skeletal system.
Any ideas? Thanks in advance! You guys are great.
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Old 03-17-2006, 11:21 AM
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Here are some ideas for exactly that [url]http://www.juliantrubin.com/fairprojects/medicine/skeletalsystem.html[/url] hope this helps
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Old 03-18-2006, 04:38 PM
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Hey, thanks for the page!
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Old 03-18-2006, 08:01 PM
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Cool Maybe.....

what happens when bone marrow starts to decrease?
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Old 03-18-2006, 10:39 PM
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Quote:
Originally Posted by SmartyC
what happens when bone marrow starts to decrease?
Hm...I don't know about that...Wait, isn't that the place where red blood cells are produced?
We did an experiment that drained calcium from bones. Are they somehow related?
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Old 03-20-2006, 06:49 AM
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Default Bones

You could do it on how much lbs. per square inch it takes to break certain bones.
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Old 03-20-2006, 09:02 PM
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Quote:
Originally Posted by All Knowing
You could do it on how much lbs. per square inch it takes to break certain bones.
Hmm...Well, that would be kinda difficult, seeing that we'd have to go get a piece of chicken bone...

Well, thanks anyway. You guys are really appreciated.
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Old 04-20-2006, 03:48 PM
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Default A question about my project...

How and why does (dissloved) salt/sodium make a bone harder?
How and why does wine (like rice wine) make a bone harder?
How and why does (dissolved) sugar make a bone softer?
How and why does Mountain Dew make a bone softer?
How and why does lemon juice drain a bone of its minerals/calcium?
Thanks!
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Old 04-20-2006, 04:17 PM
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Make a bone harder? How did you measure hardness?

I don't know (or have a clue) about why alcohol or Na and Cl ions would make something harder, but I have a hunch about the others.

As for Mountain Dew, should be the same as sugar, but I don't understand sugar either. Check out the composition of bone. Perhaps give you a hint. I wouldn't think sugar would have any effect on calcium or phosphate...

Lemon juice? I believe it's the acid, though you'll have to make sure. Like vinegar, an acid, it makes the bone softer, right? Oh, yes, Ive read somewhere that acid makes calcium more soluble in water, so it probably dissolved with acid. Once again, you can verify it with other acids, like HCl.
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Old 04-20-2006, 08:06 PM
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Quote:
Originally Posted by dreamerofeternity
I don't know (or have a clue) about why alcohol or Na and Cl ions would make something harder, but I have a hunch about the others.

As for Mountain Dew, should be the same as sugar, but I don't understand sugar either. Check out the composition of bone. Perhaps give you a hint. I wouldn't think sugar would have any effect on calcium or phosphate...

Lemon juice? I believe it's the acid, though you'll have to make sure. Like vinegar, an acid, it makes the bone softer, right? Oh, yes, Ive read somewhere that acid makes calcium more soluble in water, so it probably dissolved with acid. Once again, you can verify it with other acids, like HCl.
Too bad. We didn't even learn about acids or bases in science. Not yet. I don't think we will. I've only been in contact with them a few times during summer school. Anyway, to stop spamming, Eh...by the hardness, I meant if you can actually bend the bone. Mountain Dew has more sodium and sugar than Coke and Sprite. I know that much. Composition of the bone? You mean, the outer membrane, compact bone, bone marrow, and spongy bone?
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