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GCSE DT > fweh > Flashcards

fweh Flashcards

1
Q

Critical evaluation

A

-manufacturing capabilities
-budget constraints
-timescale
-target audience
-materials used

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2
Q

Ethics organisations

A

-fairtrade
-FSC (Forestry stewardship council)

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3
Q

Ethics definition

A

balancing behaviour with moral principles when carrying out an activity

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4
Q

Plywood definition

A

layers of glued veneers

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5
Q

veneer definition

A

thin layer of material

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6
Q

plywood pros

A

-can make very large sheets
-not flexible; stronger than other woods

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7
Q

plywood cons

A

susceptible to water damage

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8
Q

MDF (medium density fibreboard) definition

A

sawdust + resin/glue

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9
Q

MDF cons

A

-sawdust = respiratory issues
-low strength

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10
Q

MDF pros

A

-low cost (made of waste material)
-easy to shape
-can be moulded into shape

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11
Q

chipboard definition

A

wood shavings + glue/resin

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12
Q

chipboard cons

A

-not easy to work with; splinters/flakes due + low strength

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13
Q

chipboard pros

A

-low cost (made from waste material)

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14
Q

Stock forms types

A

-regular sections
-mouldings
-dowels
-sheets (2440mm x 1220mm)

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15
Q

hardwood definition

A

deciduous- broad leaf + lose leaves in winter

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16
Q

Oak (HW) pros

A

-excellent strength
-durable

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17
Q

oak (HW) cons

A

-long time to grow; expensive
-difficult to work with

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18
Q

mahogany (HW) pros

A

-easy to work with
-red colour; aesthetics

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19
Q

mahogany (HW) cons

A

-endangered
-very expensive
-illegal/restricted import

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20
Q

beech (HW) pros

A

-very hard

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21
Q

beech (HW) cons

A

-can be expensive
-not moisture resistant

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22
Q

balsa (HW) pros

A

-very light weight
-very easy to shape
-buoyant

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23
Q

Balsa (HW) cons

A

-low strength/weak

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24
Q

birch (HW) pros

A

-low cost
-grows quickly
-nice grain aesthetics

25
Q

birch (HW) cons

A

-low resistance to rot

26
Q

jelutong (HW) pros

A

-very easy to work with

27
Q

jelutong (HW) cons

A

-not good strength
-not for structures

28
Q

hardwood list

A

-oak
-mahogany
-beech
-balsa
-birch
-jelutong

29
Q

softwood definition

30
Q

pine (SW) pros

A

-durable
-easy to work with
-low cost
-fast growth

31
Q

pine (SW) cons

A

-prone to warp/crack

32
Q

cedar (SW) pros

A

-natural oils protect from water

33
Q

cedar (SW) cons

A

-more expensive

34
Q

larch (SW) cons

A

-more expensive than cedar

35
Q

larch (SW) pros

A

-tough + durable

36
Q

soft woods list

A

-pine
-cedar
-larch

37
Q

definition strength

A

withstanding force without bending permanently

38
Q

definition tensile strength

A

withstanding force when stretched

39
Q

definition compressive strength

A

withstanding force when being crushed

40
Q

definition durability

A

withstanding wear and tear/weathering

41
Q

definition flexibility

A

how easily a material will bend/distort

42
Q

definition elasticity

A

ability to regain shape after it has been deformed

43
Q

definition plasticity

A

changing in shape permanently without cracking or bending

44
Q

definition malleability

A

ability to be easily pressed, spread and hammered into shape (all directions apply)

45
Q

definition ductility

A

ability to be stretched and permanently deformed without breaking

46
Q

definition brittleness

A

how easily a material will break without bending (opposite of ductile)

47
Q

definition hardness

A

resistance to scratching, cutting, denting and wear

48
Q

definition work hardness

A

when the structure of the metal changes as a result of repeated hammering or strain

49
Q

definition toughness

A

resistance to sudden shock without breaking or deforming

50
Q

definition impact resistance

A

resisting denting

51
Q

definition shear

A

strong sliding forces acting opposite each other (shears)

52
Q

definition stress

A

any force acting on a material

53
Q

antonym to conductor

54
Q

definition electrical conductivity

A

how easily a material allows electricity to flow through it

55
Q

definition thermal conductivity

A

how easily a material allows heat to flow through it

56
Q

definition chemical resistance

A

resists chemical attack

57
Q

definition optical

A

ability to absorb/reflect light

58
Q

how do we store/access energy

A

batteries/cells, solar cells, mains electricity

GCSE DT (1 decks)

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