Dig This: Biodegradation
People with soil allergies should probably avoid this one.
Project Time Frame
This project explores the process of biodegradation.
- To examine the ways in which different materials decompose underground.
- To encourage the development of new and improved biodegradable products.
Materials and Equipment
- Computer with internet access.
- Gardening Gloves
- Digital camera
- Magnifying glass
- Microscope (optional)
- Typical office/craft supplies (such as paper, pens & poster-board)
Biodegradation is the disintegration (chemical breakdown) of organic materials, due to prolonged exposure to earth’s natural elements. There are several different ways to measure this process. One of these ways is by simple observation.
- What does it mean to be biodegradable?
- How is biodegradation measured?
- What are the effects of nature on various materials buried in earth?
- How can we predict a material’s biodegradability?
Terms and Concepts to Start Background Research
- Read overviews of related concepts (see bibliography)
- Collect 10 or 20 small, unwanted items of different types. Foods, fabrics, plastics, leaves, packaging materials… Use your imagination when selecting these items.
- Photograph each item individually.
- Bury each item separately in the same type of soil, with at least six inches of dirt on top.
- Mark each spot with a sign describing what is buried there.
- Once a week, unearth each item, analyze it, photograph it, and rebury it.
- Continue doing this every week for 5-8 weeks.
- Interpret results in a detailed report.
- Show results visually using photos taken throughout the course of the experiment.
- Include the remains of each item in your science fair display.
Wiki article: “Biodegradable”
Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state’s handbook of Science Safety.