Natural timbers (AQA GCSE Design and Technology): Flashcards
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Source of natural timber
Source of natural timber
Trees
Function of sapwood in trees
Function of sapwood in trees
Carries nutrients and water
Function of heartwood in trees
Function of heartwood in trees
Provides structural support
Leaf type of hardwood trees
Leaf type of hardwood trees
Broad, flat leaves
Growth time for hardwood trees to mature
Growth time for hardwood trees to mature
Over 100 years
Type of hardwood trees (seasonal)
Type of hardwood trees (seasonal)
Deciduous (shed leaves annually)
Key properties of mahogany
Key properties of mahogany
Exceptional strength and durability
Strongest and most durable hardwood
Strongest and most durable hardwood
Oak
Unusual property of balsa hardwood
Unusual property of balsa hardwood
Remarkably lightweight
Leaf type of softwood trees
Leaf type of softwood trees
Needle-like leaves
Seasonal characteristic of softwood trees
Seasonal characteristic of softwood trees
Evergreen (keep foliage year-round)
Growth time for softwood trees
Growth time for softwood trees
Approximately 30 years
Problem that can occur with pine
Problem that can occur with pine
Prone to warping and splitting
Special property of larch heartwood
Special property of larch heartwood
Natural resins resist decay
Purpose of seasoning timber
Purpose of seasoning timber
Removes moisture, makes timber stable & workable