Decomposition Chemical Changes

Time release video of a hamburger decomposing. If the hamburger is too gross, another option is the fruit. The different types of hamburgers does stir up a lively conversation.

Daily question-

What type of change is occurring? Physical or chemical? How do you know?

http://www.youtube.com/watch?v=8uHxRwQqWFo&feature=youtube_gdata_player