Materials assessment y10

Question 1

Physical properties

Answer 1

the traits a material has before it is used

Question 2

absorbency

Answer 2

the ability to soak up moisture, light or heat, e.g. natural materials (such as cotton or paper) tend to be more absorbent than man made materials (acrylic or polystyrene)

Question 3

density

Answer 3

how solid a material is. measured by dividing mass (grams) by volume (cm^3)

Question 4

fusibility

Answer 4

the ability of a material to be heated and joined to another material when cooled, eg webbing is fusible and can be welded onto fabrics

Question 5

electrical condutivity

Answer 5

the ability to conduct electricity, eg copper is a good conductor of electricity

Question 6

thermal conductivity

Answer 6

the ability to conduct heat, eg steel is a good heat conductor

Question 7

bleed proof paper physical properties

Answer 7

white, can be textured, thin

Question 8

bleed proof paper working properties

Answer 8

coated to stop colour seeping, ink stays bright on the surface

Question 9

cartridge paper physical properites

Answer 9

thick, textured, rough

Question 10

cartridge paper working properties

Answer 10

expensive and opaque, used for ink and watercolour

Question 11

textile categories

Answer 11

-natural fibres
-synthetic fibres
-blended and mixed fabrics
-woven fabrics
-non woven fabric
-knitted textiles

Question 12

plant based natural fibres - cotton

Answer 12

cotton: white, fluffy, soft, absobent, cool to wear
-examples: shirt, underwear, denim

Question 13

animal based natural fibres - wool

Answer 13

-wool: animal fibres are spun into yarn. easy to dye + available in many colours and textures. warm, crease resistant.
-examples: jumpers, coats, suits

Question 14

animal based natural fibres - silk

Answer 14

-silk: very fine fibre from cocoon of the silk worm. readily takes dye. Soft, fine finish, gentle on skin, feels cool in summer and warm in winter, absorbent, strong when dry.
-examples: luxury clothing + bed sheets

Question 15

synthetic fibres (crude oil) - polyester

Answer 15

-polyester: tough strong, hard wearing. Hold colour well, non absorbing so quick drying.
-examples: clothing, fleece garments, carpets

Question 16

synthetic fibres (crude oil) - polymide

Answer 16

-polyamide (nylon) : versatile fabric, good strength, hardwearing, non-absorbent.
-examples: clothing, ropes, parachutes sports materials

Question 17

synthetic fibres (crude oil) - elastane (LYCRA)

Answer 17

-elastane: stretchy, allows freedom of movement, quick drying.
-examples: sportswear, exercise clothing, swimwear, hoisery

Question 18

Woven Textiles

Answer 18

• yarns are woven together to form fabrics
  -the commonly used types are plain weave and twill weave
• a loom weaves two threads - the warp and the weft - at right angles to each other
• the self-finished edge is known as the selvedge, stops fabric from fraying.

Question 19

Non-woven textiles

Answer 19

• a sheet of web fibres are bonded thermally, chemically or mechanically. example: disposable face mask

Question 20

Non-woven textiles (felted fabric)

Answer 20

-felted fabric: Randomly matted fibres, often wool, available in many thicknesses and colours. Formed with moisture, heat and pressure, can be shaped as it has no elasticity or drape, used for hat making.

Question 21

Toughness

Answer 21

The ability to absorb energy through shock without fracturing

Question 22

Ductility

Answer 22

The ability to be stretched out or drawn into a strand without snapping.

Question 23

Elasticity

Answer 23

The bility to return to its original state afer being compressed or stretched.

Question 24

Strength

Answer 24

The ability of a material to withstand a force such as pressure, tension or shear.

Question 25

Hardness

Answer 25

The ability to resist abrasive wear and indentation through impact, Very hard materials can become brittle.

Question 26

Malleability

Answer 26

The ability to deform under pressure without cracking splitting or tearing.

Question 27

Grid Paper

Answer 27

Physical properties: White paper printed with a variety of grids, e.g. isometric, graph etc Working properties: Lines are usually blue but can be darker to trace through

Question 28

Layout Paper

Answer 28

Physical properties: Smooth finish, off-white colour, translucent (see-through) Working properties : Takes most media well

Question 29

Tracing Paper

Answer 29

Physical properties: Translucent (see-through), smooth Working properties: Shiny, takes pencil well

Question 30

Corrugated card

Answer 30

Physical properties: Paper bonded to the outside Working properties: Corrugations make it strong, protective and insulating; used in packaging

Question 31

Duplex board

Answer 31

Physical properties: Two layers of card bonded together Working properties: Stiff, lightweight and printable for packaging

Question 32

Foil lined Board

Answer 32

Physical properties: White card with foil backing Working properties: Stiff and oil resistant, foil backing reflects heat, used for food containers

Question 33

Foam core board

Answer 33

Physical properties: Smooth surface, laminated with white board Working properties: Thick and rigid, available in a variety of thicknesses, prone to creasing and cracking, used for models and mounting photographs

Question 34

Inkjet card

Answer 34

Physical properties: Bright white and smooth on both sides Working properties: Deep colours as the photographic ink sits on the surface

Question 35

Solid White Board

Answer 35

Physical properties: Smooth on both sides Working properties; Stiff, can be cut or scored

Question 36

Hardwood

Answer 36

deciduous -loses leaves in winter -broad leaves -grows very slowly

Question 37

Softwood

Answer 37

Coniferous -needles and cones -keeps leaves all year round

Question 38

Beech

Answer 38

Tool handles: it is more elastic and is very resistant

Question 39

Mahogany

Answer 39

Instruments: it an produce a very deep warm tone and wont break easily

Question 40

Oak

Answer 40

tables: durable, strong, and sturdy

Question 41

Balsa

Answer 41

model airplanes: lightweight, and also strong

Question 42

Pine

Answer 42

furniture: it offers a good deal of stiffness strength and shock resistance

Question 43

Larch

Answer 43

fence posts: it is stable and durable

Question 44

Spruce

Answer 44

furniture: affordable and quite cheap

Question 45

MDF

Answer 45

handles humididty better, strong doesn't get damaged easily

Question 46

Plywood

Answer 46

Beams: high impact- strong

Question 47

DSB

Answer 47

flooring: cheap, durable