Algodoo

On each contact: red eats half of orange and its area is increased by the same amount, so the sum of the area is conserved.
Orange eats yellow, yellow eats green, green etas cyan, cyan eats blue and blue eats finally red again, so it's cyclic.

The clipart is from
http://www.clipart-kiste.de/archiv/krokodile.html
wich is free, but rights remain at the author of the crocodile-picture, see the website above.

If someone can help me with resizing the picture to the
area of the squares, that would be nice.

The scenario is intended to generic learning by pupil, so they
find out about squareroots of 2,3,4,5,6, which are the
lengths of edges (e.g. if red eats all of orange , red will
have sqrt(2) as length of edge).

The values of these squareroots will also give an example of
a non-linear function, pre-thinking for later usage.




tags: conservation-law, schulemathe