Have you ever eaten rock?

As part of our Jurassic coast topic Year 2 today made some sedimentary rock. The special part about it was that it was edible! We have been looking at how fossils are formed over time and how layers are built up. To show this first hand we grated milk and white chocolate and then layered it in a see through container. We used chocolate chips as fossils and compacted the layers down with a spoon. After we had chilled the rocks in the fridge for an hour we were able to cut the rocks and expose the layers and fossils. All of the children loved doing this and of course enjoyed destroying the rocks (by eating them).

Below is the instructions if you fancied doing this again at home:

Making Chocolate Rocks

Serves a class of 30

 

Ingredients

•        200g grated milk or dark chocolate

•        200g grated white chocolate

•        30 cups

•        30 squares of cling film

 

Sedimentary

– created from sediment layers under the sea.

Sandstone, Limestone, Chalk, Shale

 

1. Place the cling film into the cup.
2. Place 2-3 teaspoons of grated milk or dark chocolate into the cup.
3. Place 2-3 teaspoons of grated white chocolate into the cup.
4. Repeat with a second layer of milk or dark chocolate.
5. Fold the cling film over the top.
6. Push down hard with fingers until the chocolate feels like is has stuck together.
7. Pull out gently and unwrap.
8. Break the rock in half to reveal the layers.
9. Put a some of this rock to one side and use the rest to make metamorphic rock.