The Greek word that is the root of plastic?

• plastikos
• plaster
• plastekes
• plastee

Injection molding.  How do I know I have injected enough plastic into the mold?

• it stops moving
• it starts oozing out of the mold
• the handle is removed
• the mold clamp moves

• temperature gauge
• thermostat
• nozzle
• handle

What are some advantages of plastics?

• Cheaper to manufacture 
• Stronger than similar products made from natural material
• Often better quality 
• All of the above

• heater
• frame
• switch
• vacuum table

• handle
• plunger
• nozzle
• thermostat

There are two types of plastic.

• True
• False

Melamine is used for making

• kitchenware.
• football helmets.
• pipes for plumbing.
• all of them.

Thermosets cannot be remolded.

• True
• False

Gutta Percha comes from what?

• a gutta percha tree
• a gutta percha plant
• a maple tree
• silly putty