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GCSE Tech > Materials > Flashcards

Materials Flashcards

1
Q

What are hardwoods

A

Trees which stop growing in winter (deciduous)

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2
Q

What’s more expensive hardwood or softwood

A

Hardwood

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3
Q

What are softwoods

A

Trees which grow all year (coniferous)

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4
Q

What are manufactured boards often made from

A

Waste wood, low grade or recycled timber

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5
Q

What is a veneer

A

A thin slice of more expensive wood, which typically covers a cheaper manufactured board

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6
Q

On average how long does it take softwoods to grow

A

25 years

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7
Q

What colour is ash, and what properties does it have

A

It is pale, and is flexible

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8
Q

What colour is beech and what are its properties

A

Beech is pink, and is very durable

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9
Q

What colour is mahogany and what are its properties

A

Deep reddish brown, very durable

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10
Q

What colour is pine what are its properties

A

Pine is pale yellow, and is lightweight and easy to work with

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11
Q

Name 3 softwoods

A

Pine, Spruce and Larch

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12
Q

What are ferrous metals

A

Metal containing iron

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13
Q

Qualities of ferrous metals

A

they rust
the are magnetic

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14
Q

Name 3 ferrous metals

A

Mild steel
Steel
Cast iron

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15
Q

What are Non-ferrous metals

A

metals which do not contain iron

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16
Q

Qualities of non ferrous metals

A

Not magnetic
Do not rust

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17
Q

3 Non ferrous metals

A

Copper
Gold
Silver

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18
Q

What are alloys

A

2 or more metals mixed together

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19
Q

2 Alloys

A

Brass
Stainless steel

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20
Q

Qualities of aluminium

A

Lightweight, strong, ductile

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21
Q

What type of metal is aluminium

A

non ferrous

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22
Q

Qualities of copper

A

When oxidised, turns green
very good electrical conductor

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23
Q

What are thermoforming polymers

A

Polymers which can be re heated and shaped multiple times

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24
Q

What are some uses of thermoforming plastics

A

Vacuum forming
Blow moulding

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25
Q

What are thermosetting polymers

A

Polymers which can only be set once

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26
Q

What is the logo for PET

A

A triangle made from arrows with a one in the centre

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27
Q

What does HDPE stand for

A

High density polyethylene

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28
Q

Uses of HDPE

A

milk bottles, hard hats and wheelie bins

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29
Q

Logo for HDPE

A

Same as PET but with a 2

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30
Q

What is PVC uses

A

Raincoats and pipes

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31
Q

Logo for PVC

A

triangle with a 3

32
Q

What does LDPE stand for

A

Low density Polyethylene

33
Q

What are uses of LDPE

A

bin bags, food wraps

34
Q

Logo for LDPE

A

triangle with 4

35
Q

What is the logo for PP

A

5

36
Q

What is the logo for HIPS

A

6

37
Q

What is the logo for PMMA

A

7

38
Q

What type of plastic is epoxy resin

A

Thermosetting

39
Q

what are the 4 types of fibres

A

plant based
animal based
synthetic fibres
blended fibres

40
Q

What are woven textiles

A

Woven textiles are produced by weaving yarn

41
Q

What are non woven textiles

A

made directly from fibres without being spun into yarns

42
Q

What are knitted textiles

A

interlocking yarn loops to make a fabric

43
Q

What does weft knitting mean

A

weft knitting fabrics are more stretchy due to loose knitted yarn

44
Q

What is warp knitting

A

Warp knitting is less stretchy, and it holds its shape for longer

45
Q

What type of fibre is cotton

A

A plant based natural fibre

46
Q

What is polyester

A

A synthetic fibre, which is strong and hard wearing

47
Q

What are the properties of lycra

A

Freedom of movement, stretchy, dries quickly

48
Q

What is the weft thread

A

the horizontal thread

49
Q

What is the warp thread

A

the vertical

50
Q

What is paper made from

A

wood pulp

51
Q

What is paper measured in

A

Grams per square metre

52
Q

What is added to paper to make rag paper

A

cotton

53
Q

What is absorbency

A

a material’s ability to absorb or take in water, electricity, heat, or light

54
Q

What is density

A

how compact the material is

55
Q

What is fusibility

A

A material’s ability to be converted through heat to a liquid, combined with another, before cooling as one material

56
Q

What is strength

A

a materials ability to withstand a force such as tension, shear, or pressure

57
Q

What is hardness

A

A materials ability to resist abrasive wear and indentation

58
Q

What is toughness

A

A material’s ability to absorb energy through shock without fracturing

59
Q

What is malleability

A

A materials ability to deform under compression, without tearing splitting or cracking

60
Q

What is elasticity

A

A mareitals ability to return to its original shape after being stretched or compressed

61
Q

What manufactured board is made up of thin layers of wood angled at 90 degrees

A

ply wood

62
Q

Triangle with a 1

A

PET

63
Q

Triangle with a 2

A

HDPE

64
Q

Triangle with a 3

A

PVC

65
Q

Triangle with a 4

A

LDPE

66
Q

Triangle with a 5

A

PP

67
Q

Triangle with a 6

A

HIPS

68
Q

Triangle with a 7

A

PMMA

69
Q

How is paper strengthened

A

Paper is strengthened when it is laminated (layered) with other paper/boards.

70
Q

What are three common types of paper

A

cartridge paper
layout paper
tracing paper

71
Q

How man microns = 1 mm

A

1000 microns

72
Q

What is paper made from

A

wood pulp

73
Q

What is cartridge paper

A

rough surface,
thicker than usual

74
Q

What is layout paper

A

smooth,
translucent and thin

75
Q

What is tracing paper

A

very translucent
good for copying/tracing images

76
Q

What are 3 types of common boards

A

Corrugated cardboard
duplex board
foil lined board

GCSE Tech (8 decks)

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