Experiment and Results
The first two cups that we made were made out of clay from the Fraser River so it's natural. We formed that clay into two cups. In the first cup we put cold water and after about 30 seconds we dumped that water out into a glass bottle. The water was dirty from the clay. In the other cup we put hot water but the water was so hot that it made a hole in the cup but the water was less dirty.
The other cup that we made was made out of leaves and biodegradable glue. We put a layer of leaves on some wax paper and then we put a layer of biodegradable glue on those leaves. After the glue was dry, we put another layer of leaves on it. We did the bottom in the same way. After it was all dry, the glue started to peel off from the leaves.
Links:
Interview with Dr. Gerry Reimer
What does "biodegradable" mean?