Spark did an experiment to see how Igneous rocks are formed. Igneous rocks are formed when magma cools and changes into solid rock. There are two kinds of Igneous rocks, extrusive and intrusive. Extrusive rocks are formed when a volcano erupts and the lava hardens on the surface of the earth. Intrusive rocks are formed on the inside of the earth. Intrusive rocks move to the top of the earth through erosion or when the earth shifts.
To do the experiment Spark used a cup of hot water, a spoon, a square of milk chocolate, a cup of cold water and a saucer.
First the spoon needed to be heated up so he put it in the cup of hot water for about a minute.