In this unit I learned about Convection,Conduction,and Radiation. Conduction is the flow of heat from one object to another by direct contact between the objects. Convection is the flow of thermal energy that occurs when a warm liquid or gas moves from one place to another. Radiation is the transfer of energy from one place to another without the use of matter. My favorite project that we did in this unit was the balloon project. It was so funny when my groups balloon would not go down!! Of curse the test was my least favorite because I get so nervous=http://!! I still wonder how they are the same in one way???? Did you like the balloon chapter???????????