1. True or False Questions (1 point each): 1. ( ) The triangle relationships in the field of materials science and engineering refer to the relationships between structure, processing and applications of materials. Usually metals have higher density than polymers. 2. ( 3. For ionic bonds, electrically charged ions are formed by the transference of valence electrons from one atom type to another. 4. ( Secondary bonding is stronger than primary bonding. 5. Polycrystals (polycrystalline materials) are materials which the atomic order extends uninterrupted over the entirety of the specimen; under some circumstances, polycrystals may have flat faces and regular geometric shapes. 6. A single crystal is isotropic. 7. ( ) The stacking sequence in HCP is ABABABAB... 8. ) The stacking sequence in FCC is ABCABCABC... 9. ( ) Iron can be BCC or FCC, dependent on the temperature. This phenomenon is called polymorphism. 10. a A nanomaterial refers to a material with at least one dimension smaller than 1000 nm