17. Match each term to the correct definition.
A structure in which atoms are arranged in repeating patterns.An alloy containing iron and other elements, including carbon.Materials whose external or internal dimension measures 100 nanometres or less.The combination of two or more materials having significantly different properties.The tendency of a material to increase its size and density when temperature increases.A synthetic polymer with elastic properties.A rock having sufficient quantity of one or more elements or compounds.The smallest particle of an element.The ability to resist deformation.The relationship between the mass and the volume of a material.
Atom →
Stiffness →
Thermal expansion →
Density →
Ore →
Crystal structure →
Steel →
Elastomer →
Composite →
Nanomaterials →
18.1 Translate the sentence into English: Le proprietà termiche di un materiale si riferiscono alla risposta del materiale al cambiamento di temperatura.
aperta
Soluzione suggerita: The thermal properties of a material refer to the material’s response to temperature changes.
18.2 Translate the sentence into English: Il platino e l’argento non reagiscono con altri materiali quindi si dicono inerti.
aperta
Soluzione suggerita: Platinum and silver do not react with other materials, so they are called inert.
18.3 Translate the sentence into English: I metalli hanno un elevato punto di fusione grazie ai loro legami rigidi.
aperta
Soluzione suggerita: Metals have a high melting point due to their rigid bonds.
18.4 Translate the sentence into English: Il titanio e le sue leghe sono usati nell’industria aerospaziale perché sono molto leggeri.
aperta
Soluzione suggerita: Titanium and its alloys are used in the aerospace industry because they are very lightweight.
18.5 Translate the sentence into English: I biomateriali polimerici sono degradabili quando sono assorbiti dai tessuti.
aperta
Soluzione suggerita: Polymeric biomaterials are biodegradable when absorbed by tissues.
18.6 Translate the sentence into English: I materiali intelligenti sono reattivi perché cambiano le loro proprietà.
aperta
Soluzione suggerita: Smart materials are reactive because they change their properties.
19. Underline the correct option in order to complete each sentence properly.
1. Plasticity / Ductility is the ability to deform permanently without breaking.
2. The ability of a material to conduct heat is called thermal expansion / conductivity.
3. Cast / Wrought iron is an alloy with so little carbon content that it is almost pure iron.
4. Alkali / Noble metals are very reactive.
5. Thermoplastic / Thermosetting polymers are very ductile because their molecular chains are not rigidly connected.
6. Magnetorheological / Piezoelectric materials generate an electric charge when mechanically deformed.