This week in science we learned about crystals. We melted moth balls in class and the let them cool under different cicumstances to see how big the crystals would form. We let one cool in a glass of ice water, one cool at room temperature, and one cool in a very hot temperature. The moth ball that we put in the cold temperature formed a crystal very quickly and the moth ball we put in the hot temperature formed a crystal very slowly.

When the crystals were done forming we looked at them and they were all different sizes. The crystal that formed in the hot temperature was very small. The crystal that formed in the cold temperature was large and the crystal formed in room temperature was inbetween the sizes of the other two crystals. We realized that the longer it takes for the crystals to cool, the larger the crystals will be. If the crstal takes a long time to cool then the crystal will be very small and thin.

We also realized that if magma takes a long time to cool then the crystals inside it will be bigger. If the magma takes a very short time to cool then the crystals will be smaller. The moth balls are just like the rock and magma because the crystals form the same way in both.