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Design And Technology > Chapter 3- Materials And There Working Properties > Flashcards

Chapter 3- Materials And There Working Properties Flashcards

1
Q

What is absorbency?

A

Tendency to attract or take in an element

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2
Q

What is density?

A

The mass of material per unit of volume

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3
Q

What is fusibility?

A

Ability of material to be converted through heat into liquid then mixed with another material

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4
Q

What is electrical conductivity?

A

Ability to conduct electricity

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5
Q

What is thermal conductivity?

A

Ability of material to conduct heat

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6
Q

What is strength?

A

The ability of a material to withstand a force

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7
Q

What is hardness?

A

Ability to resist abrasive wear

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8
Q

What is toughness?

A

Ability to absorb energy / shock without fracturing

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9
Q

What is malleability?

A

Ability to deform under compression without breaking

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10
Q

What is ductility?

A

Ability to be stretched out into a thin strand without snapping

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11
Q

What is elasticity?

A

Ability to return to it’s original shape after being compressed /stretched

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12
Q

What are papers and boards made out of?

A

Wood pulp

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13
Q

Bleed proof paper

A

Appearance- Coated white
Characteristics- stops solvent based markers staining through paper
Uses- For Marker pens

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14
Q

Cartridge paper

A

Appearance- Thick white paper
Characteristics- Opaque
Uses- watercolour

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15
Q

Grid paper

A

Appearance- white paper with printed grid/ isometric
Characteristics- faint lines often blue ink
Uses- Graphic, scientific + Mathematical diagrams

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16
Q

Layout paper

A

Appearance- Off white, medium opacity sheet
Characteristics- semi-translucent
Uses- Creating sketches

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17
Q

Tracing paper

A

Appearance- low opacity, off white paper
Characteristics- takes pencil + most colours
Uses- Copying and tracing images

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18
Q

Corrugated Cardboard

A

Appearance- Natural brown board finished
Characteristics- Strong lightweight
Uses- Packaging, impact protection

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19
Q

Duplex board

A

Appearance- 2 layers of card bonded together + off white
Characteristics- Lightweight
Uses- Donut box + Food+ Drink

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20
Q

Foil lined board

A

Appearance- white card coated with tin foil on one side
Characteristics- water+ oil resistant
Uses- Takeaway containers

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21
Q

Foam core board

A

Appearance- Smooth board, foam inner core
Characteristics- Can crack under pressure + rigid in all places
Uses- Model making

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22
Q

Ink jet card

A

Appearance-Brilliant white
Characteristics- holds a high quality photo image
Uses- Photographic images

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23
Q

Solid white board

A

Appearance- High quality card
Characteristics - holds colour well
Uses- Greeting cards

24
Q

Where is hardwood from?

A

Deciduous trees- drops it’s leaves in winter

25
Q

Where is softwood from?

A

Evergreen trees- keep their needled all year round

26
Q

What is felling?

A

A term used for cutting down trees

27
Q

What are the properties of hardwood?

A
  • Have less porous and denser cell structure
  • Less prone to rotting
  • High value
28
Q

Ash

A
  • Hardwood
  • Pale/brown
  • Flexible + Tough
  • Used for sports equipment
29
Q

Beech

A
  • Hardwood
  • Close grain with pink hue
  • Fine finish
  • Used for children’s toys
30
Q

Mahogany

A
  • Hardwood
  • Rich reddish brown
  • Durable + finishes well
  • Used for high end furniture
31
Q

Oak

A
  • Hardwood
  • Light brown
  • Tough + Hard
  • Furniture
32
Q

Balsa

A
  • Hardwood
  • Pale cream/ white
  • Very soft + Spongy
  • Used for prototyping
33
Q

What are the properties of softwood?

A
  • More porous cell structure
  • Can absorb moisture + begin to ro
  • Easy to add stain
34
Q

Larch

A
  • Softwood
  • Pale brown
  • Tough, durable + water resistant
  • Used for flooring
35
Q

Pine

A
  • Softwood
  • Pale yellow
  • Lightweight + easy to work
  • Used for interior construction
36
Q

Spruce

A
  • Softwood
  • White/cream
  • High stiffness to weight ratio
  • Used for furniture + musical instruments
37
Q

What are manufactured boards?

A

Sheets of processed timber waste combined with adhesives

38
Q

Medium density Fibreboard

MDF

A
  • Manufactured board
  • Smooth dull
  • Rigid + stable
  • Used for flat pack furniture
39
Q

Plywood

A
  • Manufactured board
  • Very stable in all directions
  • Used for furniture + shelving
40
Q

Chipboard

A
  • Manufactured board
  • Pale grey/brown
  • Prone to chipping + good compressive strength
  • Used for kitchen units
41
Q

Where are metals found?

A

In an ore- type of rock that contains metals in small quantities

42
Q

What are ferrous metals?

A

That can rust

43
Q

What are non-ferrous metals?

A

They do not rust, but can oxidise

44
Q

Low carbon steel

A
  • Ferrous metal
  • Bright grey + smooth texture
  • Tough + Ductile
  • Used for construction
45
Q

High carbon steel

A
  • Ferrous metal
  • Smooth texture
  • Less ductile
  • Garden + workshop tools+ cutting tools
46
Q

Cast iron carbon

A
  • Ferrous metal
  • Dull + Rough texture
  • Hard but brittle
  • Used for kitchen pots
47
Q

What is the thin oxide layer around a metal called?

A

Patina

48
Q

Aluminium

A
  • Non-ferrous metal
  • Light grey + can be polished
  • High strength to weight ratio + lightweight
  • Used for pots + pans
49
Q

Copper

A
  • Non- ferrous metal
  • Light reddish brown
  • Malleable + Ductile
  • Used for electrical cables
50
Q

Tin

A
  • Non- ferrous metals
  • Silvery white
  • Soft + Good electrical conductor
  • Used for plating surfaces
51
Q

Zinc

A
  • Non-ferrous metal
  • Silvery grey
  • Malleable + ductile
  • Used to galvanise steel
52
Q

What are alloys?

A

A mixture of at least one pure metal and another element

53
Q

Brass

A
  • Alloy of copper + zinc
  • Yellowish gold
  • Used for musical instruments
54
Q

Stainless steel

A
  • Alloy of low carbon + Chromium
  • Silver hue + resists rust
  • Hard + very smooth
  • Used for cutlery + medical equipment
55
Q

High speed steel

A
  • Alloy of Carbon + cobalt
  • Can withstand high temp
  • Used for cutting tools: drills etc

Design And Technology (9 decks)

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