atomic properties
density, mass etc
ex) compare magnesium tungsten with aerogel
thermal properties
melting point, thermal conductivity etc
ex compare aerogel with a diamond
mechanical properties
strength, ductility, hardness, etc
ex) compare ductility before and after quenching car ...
Impact of Materials on
Society
atomic properties Correct Answer: density, mass etc
ex) compare magnesium tungsten with aerogel
thermal properties Correct Answer: melting point, thermal conductivity etc
ex compare aerogel with a diamond
mechanical properties Correct Answer: strength, ductility, hardness, etc
ex) compare ductility before and after quenching car aluminum/steel/magnesium
optical properties Correct Answer: color reflectivity etc
magnetic properties Correct Answer: electricity
properties of Metals Correct Answer: High density, strong, ductile
High thermal and electrical conductivity.
Opaque, reflective
Can corrode
properties of Ceramics Correct Answer: Medium density
Brittle, glassy, inelastic
Non-conducting (insulators).
Corrosion resistant.
properties of Polymers Correct Answer: Long carbon chains
Soft, ductile
Low strength, low density,
Thermal and electrical insulators ,
corrosion resistant
Composites Correct Answer: Where your mixing two or more materials; particle
reinforced.
Ex: concrete.
Role of Clay Correct Answer: Ancient uses of clay
, -Buliding materials
-writing materials
-cooking materials
-storage materials
-sling ammuniton
-musical instuments
-medical (Ermenian bole/ early milk of magneisa)
Clay modern uses
-pottery
-builiding materials
-odor absorbants (cat litter)
-oil drilling wells
-gasoline production
-paper making
-cement production
-mold binders
Clay structure/definition Correct Answer: Clay composition
Usually Aluminum (Al), Silicon (Si), and Oxygen (O), and other elements
sometimes
Clay definition
Naturally occurring material composed of grained materials that show plasticity
(flexibility), when different water amounts are added. Clay can be harden when its
dried and/or fried (heated)
Clay properties
High strength in compression (after firing).
Poor strength in tension.
You wouldn't want to build a clay bridge. It would collapse
Clay history Correct Answer: -Paleolithic (2.5 M to 15,000 yrs ago)
*Central Europe
*Clay figurines
-Mesolithic (15,000-11,000)
*Japanese Pottery
-Neolithic (10,000 to 5000 years ago)
*Jerico/Israel clay bricks
*rise of the mesopotamian/sumarians
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