2. (5 points) In the space provided indicate whether the following statements are true (T) or false (F) Isotactic polypropylene is an amorphous plastic Chain branching increases crystallinity in plastics It is the crosslinking in thermosets which prevents thermal softening Atactic polypropylene is an amorphous plastic Polyethylene is a themsetting polymer 3. (1 point) Everyday Americans buy 62 million newspapers and throw out 44 million. That is equivalent of dumping 500,000 trees into a landfill every week! Which of the following materials can help? Metal Plastic Electronic ink 4. (point) What do skateboards, cell phones, and surgical scalpels have in common? Which of the following material can be used to make them all better? Glass Amorphous metal Wood 3. (1 point) What type of bonding makes up ceramic materials? covalent bonds London dispersion forces metallic bonds ionic bonds 6. poist) All are attributes of ceramics, oncept covalent bonded low melting point