This is what i learned in this chapter. I learned about  how air particles move by depending on the temperature. I also learned how different types of energy travel through different objects. These objects are conductors and insulators. Another thing  i learned was expansion and contractsion, it was favorite thing to learn about this year. It was my favorite because we did a lab with a balloon, when we put it in hot water the balloon went up, and when I put it on the cold water it went down. That is what i learned this chapter.