We continued our study of combustion with a review of why burning candles lose mass.  We watched a video in which Mr. Anderson describes not only the process of combustion but also the concept of Conservation of Mass.  At the end of the video, he mentions how neat a candle burning in the space shuttle looks, so I also included a video of the recent FLEX2 experiment aboard the International Space Station.  After the lesson, students completed a quiz connecting the concepts of combustion, cellular respiration, and photosynthesis.