Here are the quick links to the Decomposition Experiment Google documents for each period:
Period 1
Group 1
Group 2
Group 3
Group 4
Period 3
Group 1
Group 2
Group 3
Group 4
Group 5
Period 4
Group 1
Group 2
Group 3
Group 4
Period 6
Group 1
Group 2
Group 3
Group 4
Helpful Resources:
"Long Rise Pizza Doughs" - the introduction of fermentation and chemical reactions as a way to explain what is happening during the grape decomposition experiments. http://sciencegeist.net/long-rise-pizza-doughs/
Decomposing the different components of food - compilation of outside resources (See document below)