Matter + Materials

Front 1

matter

Back 1

made up of particles whose properties determine the observable characteristics of matter

Hint 1

particles......characteristics....

Front 2

material

Back 2

refers to substance(s) put of which anything with mass is made

Hint 2

substances..... anything....mass

Front 3

properties of matter

Back 3

*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

Front 4

types of materials

Back 4

metals, ceramics, glass, plastics, fibres

Front 5

examples and general properties of metals

Back 5

-eg: iron, copper

-gp:#strong(compression+

tension)

#malleable + ductile

#high density(sink)

#high melting point

Front 6

examples and general properties of ceramics

Back 6

eg: china, bricks

gp:#strong when compressed, weak when streched

#hard

#brittle

#high melting points

#heat resistant

#chemically unreactive

Front 7

examples and general properties of glass

Back 7

eg: bottle glass, lead crystal glass, pyrex glass

gp:#transparent

#hard

#brittle

#chemically unreactive

#high melting point

Front 8

examples and general properties of plastics

Back 8

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

Front 9

examples and general properties of fibres

Back 9

eg:cotton, polyester

gp:#form long, hair - like strands

#fexible

#may burn when heated in air

Front 10

classifying materials

Back 10

Front 11

mixtures pure or impure?

Back 11

impure-consist of more than one kind of matter

Front 12

mixture definition

Back 12

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.

Front 13

substances that make up a mixture are:

Back 13

#not in fixed ratio

#keep their physical properties

#can be separated by mechanical / physical means

Front 14

heterogeneous mixture

Back 14

mixture of non-uniform composition and of which the components can be easily identified

-eg:smoke(soot), salad dressing

Front 15

homogeneous mixture

Back 15

-is of uniform composition and in which all the different components are in the same phase

-eg: solution of NaCl

Front 16

alloy?

Back 16

-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

Front 17

steel

Back 17

-an alloy made up mainly of iro. with small amount of carbon(make harder), manganese(make strong) and chromium(prevent rusting).

Front 18

chromatography

Back 18

processof separating substances into individual components

Front 19

pure substances

Back 19

-elements + compounds

-complex chemical methods needed to break down pure substances into their parts