Part D:
The cylinders are made from the following materials:
"Poly" means many. These are polymers or long molecule chains of small units
Maple ( wood)
Aluminum (metal)
Polypropylene
Polystyrene
Nylon
Acrylic
Polyurethane
Phenol formaldehyde resin
PVC ( Polyvinylchloride)
Teflon ( PTFE )
Cubes from Part C:
Aluminum
Steel
Acrylic
Oak
Poplar
PVC
Copper
Iron