I learned a lot in science class this unit! I learned that particles in matter gain energy and move faster when matter is warmed. I also learned that energy in particles can make matter expand and contract. Another thing I learned is that radiation is the travel of energy without the use of matter. I really enjoyed all the labs we did this chapter. I learned a lot  from the labs which made me happy. i did not like the lesson on convection,radiation, and conduction. It was very difficult for me to understand. i still have a little trouble with it, but now i understand most of it. Though, one question i still have is what is the difference between convection and radiation? Please, comment.