Thursday 19 September 2013

Petri dishes

We are learning to write instructions. We are also learning about germs - we have been doing experiments on them. Have a look at the slideshow below... and prepare to be amazed!
Room 24 tested areas around the classroom for germs.

Materials:
dirty hands
clean hands
cotton buds
petri dish
sticky tape

 Method:
1. Dip dirty fingers in a petri dish.
2. Dip washed fingers in a petri dish.
3. Test other classroom areas with a cotton bud.
4. Seal the petri dishes with sticky tape.
5. Put the petri dishes in a warm place.
6. Watch bacteria grow...

 Thank you Chris, Edward's mother, for giving us all the petri dishes. 

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