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Design Technology 2017-2018 (GCSE AQA) > Timber > Flashcards

Timber Flashcards

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1
Q

Where does the UK’s timber come from?

A

UK imports 2/3 of its timber

Scandinavia, Russia, Canada and USA

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2
Q

Environment

A

30 trees provide oxygen for 120 people every day

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3
Q

Softwood

A 
Coniferous (evergreen) trees
Needles rather than leaves
Quick growing
Extensively used in joinery
Less expensive than hardwoods
Generally poor resistance to decay
Tend to be lightweight
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4
Q

Softwood

Larch

A

Reddish colour with an open grain
Lots of space between grain
Good resistance to rot
Used for garden fencing and patio decking

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5
Q

Softwood

Pine

A

Yellow in colour with a contrasting darker grain
Usually contains many knots
Used for joinery and furniture

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6
Q

Softwood

Spruce

A

Creamy white colour
Close grain and light weight
Used for interior furniture and stringed musical instruments

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7
Q

Hardwood

A 
Deciduous trees
Trees have broad leaves
Slow growing
More expensive than softwoods
Good resistance to decay
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8
Q

Hardwood

Oak

A

Hard, tough and durable

Used for timber framed buildings and high quality furniture

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9
Q

Hardwood

Beech

A

Hard and strong
Doesn’t splinter easily
Children’s toys, benches, furniture and tool handles

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10
Q

Hardwood

Mahogany

A

Attractive deep reddish-brown colour
Relatively easy to work
Accepts a high finish
Used for high quality furniture

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11
Q

Laminated boards

A

Several layers glued together

Veneers-thin pieces of wood

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12
Q

Laminated boards

Plywood

A

Several layers of veneer
Glued with green at 90° to the next one
Used in furniture, flooring and boat building

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13
Q

Compressed boards

A

Particles, chips or flakes of wood glued under high pressure

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14
Q

Compress boards

MDF

A 
Medium density fiberboard
Made from fine fibres of low-grade wood
Glued under pressure with formaldehyde resin 
Used in self-assembly furniture
Usually veneered to enhance appearance
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15
Q

Compress boards

Chipboard

A

Made from chips of low-grade wood
Close together under pressure
Used for kitchen worktops where it is usually covered with a polymer laminate such as melamine formaldehyde (MF)

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16
Q

Advantages of manufactured boards

A 
Cheaper
Available in large sheets
Consistent properties
Less likely to twist, warp or split
Recycled or low-grade timber
Faced with a veneer to improve aesthetic appearance
Faced with a polymer to improve working properties
Suited to CNC machining
17
Q

Disadvantages of manufactured boards

A

Affected by moisture
MDF is not biodegradable due to the glue used
Lower quality
Not as aesthetic

Design Technology 2017-2018 (GCSE AQA) (17 decks)

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