ScienceFix

ScienceFix was created to showcase the creators' favourite demos that they do in their middle school science classes.

Here is an example media type="youtube" key="lXuRn_Tt9Vg" height="390" width="640" Two things I love: chocolate and science. This video shows you how to make chocolate pop rocks. [|Pop rocks] was a crazy new candy when I was a kid. Put them in your mouth and let the crackling begin. Pop rocks is basically a mixture made when sugar and water are heated and then injected with carbon dioxide gas. The cooled mixture is the pop rocks. Put them into your mouth, the sugar disolves and the carbon dioxide gas gets released (the pop). Chocolate is a complex mixture of many ingredients, primarily sugar, cocoa butter, cocoa liquor, milk or milk powder (for milk chocolate), and vanilla. Chocolate can be melted and mixed in with other ingredients to make many different flavor combinations. Basically this demo shows how to properly melt (temper) milk chocolate and mix in flavorless pop rocks (called [|pastry rocks] ). The results are delicious pieces of chocolate that melt in your mouth which lead to a suprise crackling of the pastry rocks. Science topics that are covered include energy in phase changes, properties of mixtures, and crystalization (chocolate has to reach specific temperatures in the melting process so that cocoa butter crystals form evenly).

**Pros:** Experiment demonstrations on a range of science topics.  Easy to follow.  Easy to search topics.

**Cons:** No written instructions.  Doesn't link to any curriculum / year level.  References don't relate to the topics.