|
Assessment of Plastic Container Classification Group Members : Purpose: To use your skills of observation, laboratory testing, and reasoning to classify plastic containers into their correct resin identification codes. Procedure: 1. Take your original plastic container classification sheet that the group did earlier and decide if the group is still satisfied with the placement of the containers in the categories. If you want to change any or all, you may do so now. Just cross out the number on the container and assign a new number for a different resin code. 2. Take scissors or a hole punch and cut a 1 cm X 1 cm piece or circle from one of the containers. Follow the flow chart from the Plastics Analysis Lab to help you identify the correct code for this container. Record your observations. Repeat this step for all of your containers. The group members need to decide who is testing which container. It might be wise to have two people testing the same container for verification of the results.
Use notebook paper if you need more data recording space. Conclusions: 1. Were the containers as easy to identify as the resin pellets using the flow chart? Explain.
2. How many containers were classified correctly before you did the testing?
3. Why was the percentage of correct classification so low or so high?
4. Which kinds of plastics are now easy for you to identify by just using your senses?
5. Do you think that each plastic container has to be separated from another before a factory can use the recycled plastic to make a new product like plastic wood? Explain.
|