permeability

today was for the girls a mostly sylvanianing day. they adore playing sylvanians! they tend to only start when SB has read her book for the day – she starts the day with a book and ends the day with the book. we are getting through loads!

i did want to do some science, as over a year ago won a very ancient kit on ebay about osmosis, and have been v keen to try it out!! today was the day! unlike newr kits, it has LOADS of actual science talk in it, explaining what you are doing, why, the scientific concepts etc – great! Anyway we had a thought about permeable and impermeable, and each selected a container of each and poured water into it. we saw we were right, but that some things were more permeable than others, and infact waxing a permeable thing [ie muffin cases] greatly reduced their initial permeability. We then looked at diffusion, to prove that the molecules moved around in the water [perpetual motion/ kinetic theory ] and that we don’t need to shake to mix up a solution we dropped a copper sulphate crystal into warm water and watched the water all gradually turn blue. Unfortunately we didn’t actually get to any of the osmosis experiments, as the girls were sylvanian needy again!!

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other things done were some playdoughing, BB did more of her ‘secret’ , SB and I did a long recorder practice and some aurals [aargh!], SB wrote into her journal. I sorted out the science shelves abit, and chris turned the room of doom into a place where you might nearly be persuaded to go. Oh, and we spent a long time doing the RSPB gardenwatch – better late than never!

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We finished watching tales from the green valley – the Jacobean farm series.

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