In Science to understand the formation of rocks we put our culinary skills to the test.
To show sedimentary rock we needed to show that they are formed from deposits settling at the bottom of the seas, lakes and rivers. We showed the water bed by using blue fondant icing, coloured sprinkles to represent fossilized bones and other layers of icing and chocolate to show the layers and sediment that build up over the years.
To show metamorphic rock we needed to show that these rocks have been changed by heat and pressure. For this we used three different colours of icing, layered the different coloured icing and folded them together. Once the rocks had been made we cut them in half to see the different swirls and layers.
To show igneous rocks we needed to show that they are formed when melted rock or magma is cooled. The children mixed up mini marshmallows, broken up biscuits and chocolate drops. We did this until the chocolate had melted and then we left the mixture until it had solidified again.
The children had great fun and ate their rocks at the end of the lesson.