As part of our Rocks and Soils topic, we have been looking at how different types of rocks are formed. To do this we used…chocolate!! Yum!!
First of all we studied different sedimentary rocks, such as chalk and limestone, and discovered they were made up in layers. Therefore we added a layer of dark chocolate, a layer of milk chocolate and a layer of white chocolate, before compacting the ‘rock’ by pressing all of the layers together, which would form a new rock.
Next, we had a go at metamorphic rocks and lots of us knew that the word ‘morph’ means change. This meant we had to change the shape of our rock by heating it with our hands, like the rocks are heated from built up pressure underground. Examples of this type of rock are marble and slate and we realised that these are used in most of our houses, so they must be very important!
Finally, we begin to form our favourite type of rock, which is formed from volcanos and is called igneous rock! To make this kind of rock, we needed to use warm water to melt the chocolate completely, a little like real rocks are melted inside a volcano to make molten rock. When the molten rock, or chocolate, cools it makes a new rock such as basalt or granite!
Then we got to sample our rocks, which was perhaps the best part!!!