Science stuff - Rocks

I just found this old post still in my drafts for some reason...

We finished off our rocks study by making sedimentary and metamorphic 'rocks' using the recipes here.

To simulate metamorphic 'rocks', we took bits of coloured playdough and rolled them into little balls.

Placing them on a piece of waxed paper, and then covering them with another piece, we then used a great deal of pressure of them to simulate the earth's pressure. (ie we put a book down, stood on it and jumped up and down!)

We made sedimentary 'rocks' using sand, water & epsom salts.