Hiya,
for anyone about to start pathogens & diseases as a topic in biology.....this is a nice simple prac to introduce the kids to transmission of diseases. The best bit is it's REEEEALLY simple to set up
To make up the solutions needed :
The 'patient zero' solution is just some NaHCO3, 1tsp in 100ml water
The non-infected solution is tap water adjusted to pH 4 with a bit of HCl
For each class, number some small cups/vials so that there's one for each kid. I use little pill cups & write numbers on the bottom.
Pour 10ml of the NaHCO3 into 1 cup (& make a note of which cup number is 'patient zero').
Pour 10ml of the pH4 water into all the others.
After they've done their 3 exchanges, the phenol red turns all infected solutions pink & non-infected yellow.
Cheers,
Disease prac
- bindibadgi
- Posts: 293
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- Suburb: Kensington Park
- State/Location: SA
Disease prac
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bindibadgi
Re: Disease prac
Thanks for that, it looks beaut! I will tell the bio teacher, I'm sure she will appreciate it as she hasn't taught bio before.
- smeee
- Posts: 617
- Joined: 02 Jun 2006, 10:00
- Job Title: Lab Technician
- School: LaSalle Catholic College
- Suburb: Bankstown
- State/Location: NSW
Re: Disease prac
Same prac but different solutions.....
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Re: Disease prac
We just did that one today, and 8 kids out of a class of 14 were infected. Great stats eh!
Cheers, K
- Robdean
- Posts: 147
- Joined: 01 Jun 2006, 10:00
- School: Lismore High School
- Suburb: Lismore
- State/Location: NSW
Re: Disease prac
Thanks from me too! Will show the teachers and I'm sure they'll be impressed too!!
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- Posts: 226
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- Job Title: Labbie
- School: Goulburn High School
- Suburb: Goulburn
- State/Location: NSW
Re: Disease prac
I'm running this prac thanks to this website. Thanks heaps