Chapter 10- Sources And Properties Of Materials

Question 1

Wood based- natural wood

Answer 1

Hardwood and softwood

Question 2

Hardwood

Answer 2

Deciduous tree

Oak, ash, sycamore, mahogany

Question 3

Softwood

Answer 3

Coniferous tree

Larch, spruce, scots pine

Question 4

Manufactured woods

Answer 4

Gluing wood layers/fibres

Very large sheets

Question 5

Name manufactured wood

Answer 5

MDF- fine wood dust and resin
Plywood- thin layers glued together
Chipboard- small chips of wood glued with resin and compressed into sheets
Blockboard- core of softwood stripe glued together covered with plywood
Hardboard- pulped wood fibres then compressed

Question 6

Metals- ferrous

Answer 6

Contains iron

Stainless steel, mild steel, cast iron
Amount of carbon determines strength
Prone to rusting

Question 7

Non-ferrous metals

Answer 7

Metal with no iron

Aluminium, copper, lead, zinc

Question 8

Alloy

Answer 8

Metal produced by combining two or more metals

Colour, boiling points
Right colour and characteristics

Question 9

Common forms of metal

Answer 9

Sheets, mm
Tubes
T section
Round

Question 10

Plastics- synthetic

Thermoplastics

Answer 10

Loose chains, reheated and shaped

HDPE
LPDE
HIPS
PVC
ACRYLIC

Question 11

Thermosetting plastic

Answer 11

Permanent rigid material

Tight links

Question 12

Common forms of plastics

Answer 12

Thickness, mm
Granules
Resin
Powder form

Question 13

Paper and card

Answer 13

A sizes- most common
Board- thicker, heavier, more rigid than paper. Several layers of pulp
200gsm and above=board