Polystyrene substitute - separation prac

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Merilyn1
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Polystyrene substitute - separation prac

Post by Merilyn1 »

Hi All
My teachers here have always done a separation prac with Year 7 using polystyrene balls (from a bean bag), sand, salt and iron filings. I usually re-use the polystyrene but this year they went to the great bin in the sky. I don't have any more. I thought of breaking up some polystyrene blocks (too messy) so looked in my storeroom and found a box (a large box) of old fashioned corks. I'm not going to speak ill of my predecessors at all - I've been buying twist tops for years though :drunk:
Anyway, any thoughts - do you think cutting up the corks would work, it is going to be fiddly to do this.
I'm loathe to ask for donations of old bean bag fill - I'll end up with bags of it and it is just so annoying to handle.
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Debbie
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Re: Polystyrene substitute - separation prac

Post by Debbie »

I have purchased packets of small balls in the past - similar to these at Spotlight if that helps.

https://www.spotlightstores.com/kids/ki ... gLMFvD_BwE

I think I just got a bag from a "cheap shop" in the craft section.
bigmack
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Re: Polystyrene substitute - separation prac

Post by bigmack »

I grated up some old corks we had that were so crumbly , they were no good for anything else .
Not to sad if they didn't come back and a final use for otherwise rubbish ....and more biodegradable than polystyrene
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Kathryn
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Re: Polystyrene substitute - separation prac

Post by Kathryn »

We have used dried soup mix in the past ie split pea/lentil mix, also beads of different sizes.
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melsid
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Re: Polystyrene substitute - separation prac

Post by melsid »

We have used wood shavings in the past. They worked well.
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Lyn
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Re: Polystyrene substitute - separation prac

Post by Lyn »

Dried peas. Roughly same size as your polystyrene balls. If they don't get wet they will recycle for years. Unless of course they get a bad attack of weevils. :cheesy: Sorry, it's that time of the year. Keep them stored in a glass container with lid. Mine have survived for years and are still useable. Perhaps the next lab tech will buy new stuff.
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