Garbage Anyone?

Purpose: To understand how trash decomposes and to understand the importance of the 3 R's: recycle, reduce, and reuse

Materials

• gallon milk container with top cut off
• soil
• various trash objects
• water
• spoon or small spade
• newspaper
• science journal

Procedure

1. Discuss the various objects that are to be buried in your landfill.
2. Predict which objects will biodegrade or decompose the fastest.
3. Record your predictions in your science journal.
4. Cover the bottom of the container with approximately 3 cm of soil.
5. On top of the soil, create a trash layer by adding various items such as a plastic bag, an aluminum pop top, a banana peel, grass clippings, newspaper, leaves, and so on.
6. Cover the trash with a layer of soil and sprinkle with water.
7. Repeat steps 4-6 with other items.
8. Sprinkle the entire pile with water.
9. Use the spoon or spade to turn over the pile every three to five days. Add water as needed to keep the soil moist.
10. At the end of 6 weeks or other time period selected, empty the contents of the landfill onto several layers of newspaper.
11. Examine each item and note any differences in appearance from when you started the landfill. Record your observations in your science journal.
12. Discuss your findings and if your predictions were correct.

Conclusion

1. Which items biodegraded or decomposed the most? Why?
2. If you were to continue your landfill, how long would it take for all items to biodegrade or decompose?
3. Why would it be important to reduce the amount of trash in a landfill?
4. Could a landfill be created in space? Why or why not?
5. Why is it important for NASA to research trash?