Test Biodegradable Products in an indoor composter

We set up an experiment to determine the biodegradability of different plastics and substances: 

100% biodegradable plastic shopping bag

 25% biodegradable garbage bag

Cardboard

Cotton

Have you ever seen something labeled "biodegradable" or "compostable" and wondered what that means? 

Two months later we will collate the data, answer the questions  and create a graph. 

Discussion questions:

·         Which materials were the most biodegradable? 

·         Which materials were the least biodegradable?