This my article about Heat and Matter. 3 things I learned in this Unit is, 1. How expansion and contrast are a problem for bridges. 2. What a Conductor is, A substance through which energy travels to. 3.How animals use insulators by, air trapped in there fur.  My best thing about this unit  was, the submarine lab. My least thing in this unit was the popcorn lad because the popcorn didn't taste as good like at the movies.  My question is what was your favorite Lab you did for this Unit? Please Comment.