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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
matter |
made up of particles whose properties determine the observable characteristics of matter |
particles......characteristics.... |
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material |
refers to substance(s) put of which anything with mass is made |
substances..... anything....mass |
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properties of matter |
*strength- strong in compression(resists bending) -strong in tension(resists tearing) *thermal + electrixal conductivity -conduct heat:thermal conductor -conduct electricity:electrical conductor *brittle, malleable or ductile -brittle:hard but likely to break -malleable:ability to be hammered /pressed into shape without breaking/craking -ductile:ability to be stretched into wire *magnetic-materials that have a force field *density: mass per unit volume *boiling+ melting point -boiling point: temperature of a liquid at which the vapour pressure = the external pressure -melting point: temperature at which a solid given sufficient heat becomes a liquid /gas
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types of materials |
metals, ceramics, glass, plastics, fibres |
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examples and general properties of metals |
-eg: iron, copper -gp:#strong(compression+ tension) #malleable + ductile #high density(sink) #high melting point |
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examples and general properties of ceramics |
eg: china, bricks gp:#strong when compressed, weak when streched #hard #brittle #high melting points #heat resistant #chemically unreactive |
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examples and general properties of glass |
eg: bottle glass, lead crystal glass, pyrex glass gp:#transparent #hard #brittle #chemically unreactive #high melting point |
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examples and general properties of plastics |
eg:polythene,polystyrene gp:#flexible #easily melted and moulded #may burn when heated in air #a wide range of properties depending on the particular plastic |
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examples and general properties of fibres |
eg:cotton, polyester gp:#form long, hair - like strands #fexible #may burn when heated in air |
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classifying materials |
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mixtures pure or impure? |
impure-consist of more than one kind of matter |
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mixture definition |
mixture contains combination of different elements and /or compounds that are not chemically bonded together and can be seperated by physical processes/means(hand-sorting, magnetic separation, filtration,separating funnel and distillation. |
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substances that make up a mixture are: |
#not in fixed ratio #keep their physical properties #can be separated by mechanical / physical means |
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heterogeneous mixture |
mixture of non-uniform composition and of which the components can be easily identified -eg:smoke(soot), salad dressing |
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homogeneous mixture |
-is of uniform composition and in which all the different components are in the same phase -eg: solution of NaCl
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alloy? |
-homogeneous mixture of two or more elements, at least one of which is a metal -eg:#nichrome- Ni + Cr #brass- mixture of 2 elements (Cu +Zn) #bronze-Cu + Sn |
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steel |
-an alloy made up mainly of iro. with small amount of carbon(make harder), manganese(make strong) and chromium(prevent rusting). |
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chromatography |
processof separating substances into individual components |
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pure substances |
-elements + compounds -complex chemical methods needed to break down pure substances into their parts |
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