Water - Day Three

Our solar still has not produced any water yet, I think we may officially die of thirst soon.  Jacob says that stills don't work but I think there is not enough direct sunlight in the sun room so I've put it out on the patio to see if we can purify anything this afternoon.

The kids were up for some more experiments today so we did some hastily prepared, extra curricular stuff.  First we 'floated' a paper clip on water to demonstrate surface tension.  I found this on Science Bob, you use a small piece of tissue paper or Kleenex to place the clip flat on the surface of the water then push the tissue away with the end of the pencil and the paper clip will stay on the surface.  Both children managed to do it which was good.

Rose takes very accurate scientific observations

Then we had huge amounts of fun with the upside down cup trick.  The scientific explanation for this is on Morning Coffee Physics, it is all to do with air pressure outside the cup vs slightly lower pressure inside the cup.  For obvious reasons this went down very well!

It's water fight day tomorrow, not sure if this is a good thing or not.  Also it has occurred to me that the laptop mysteriously died the day after Jacob's interesting suggestion of seeing if it would work under water.  Mmmm.