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Technology
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- 1What are the types of constraints?Compression, tension, torsion, deflection, shearing
- 2What is a constraint?A constraint is the effect of external forces on an object
- 3What are the types of deformation?Plastic, Elastic and fracture
- 4What are the mechanical properties?Hardness, Elasticity, Resilience, Ductility, Malleability, Stiffness
- 5Describe hardnessHardness is the ability to resist indentation or abrasion
- 6Describe elasticityElasticity is the ability to return to its original shape after undergoing a constraint
- 7Describe resilienceResilience is the ability to resist shocks without breaking
- 8Describe ductilityDuctility is the ability to be stretched without breaking
- 9Describe malleabilityMalleability is the ability to be flattened or bent without breaking
- 10Describe stiffness.Stiffness is the ability to retain its shape when subjected to various constraints.
- 11What is degradation?Degradation is the decline of some of an object's properties due to the effects of the surrounding environment.
- 12How can we prevent or delay degradation?We can prevent or delay degradation by methods of protection.
- 13Why are ceramics a good material?Ceramics have a low electric conductivity (insulator), high degree of hardness, heat resistance/low thermal conductivity, resistance to corrosion (water, salts, fumes-rusting)
- 14Where does metal come from?Metal is a material extracted from a mineral ore.
- 15What are alloys?Alloys are a mixture of a metal with one or more other substances.
- 16What are the types of alloys?Ferrous (mainly iron) and non-ferrous.
- 17What is plastic made up of?Plastic is made up of polymers and other substances can be added to obtain certain desirable properties
- 18What are the types of plastics?Thermoplastics and thermosetting plastics
- 19What is thermoplastic?Thermoplastic is a plastic that becomes soft enough when heated to be moulded or remoulded and hardens when cooled.
- 20What is thermosetting plastic?Thermosetting plastic is a plastic that remains permanently hard even when heated
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- (Technology) Science Fichas sobre Technology, creado por hiphop4hope el 15/06/2015.
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- hiphop4hope
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