technology year 8 may exam Flashcards
how many types of natural timber are there?
2
what are the names of the natural timbers?
hardwood and softwood
where do hardwoods come from and what speed do they grow?
deciduous trees and they grow slowly
what the type of leaves do deciduous trees have?
broad leaves
when do deciduous trees lose their leaves?
the autumn
where do softwoods come from and what speed do they grow
evergreen trees and they grow quickly
name three softwoods
pine, spruce, cedar
name three hardwoods
mahogany, beech, oak
name three manufactured boards
plywood, medium density firebird (MDF), chipboard
what cost is pine?
low in cost
what are the properties of pine?
probably the most common softwood, can be cut and machined easily, fairly hard and stable, can be used unprotected indoors but is commonly painted or varnished.
what are the uses of pine?
gates, floorboards, furniture, skirting boards, crates and pallets
what cost is spruce?
low in cost
what are the properties of spruce?
pale in colour, tough, strong, with small knots, resistant to splitting, not very stable
what are the uses of spruce?
rafters, roofing joists, furniture
what cost is cedar?
high in cost
what are the properties of cedar?
straight grained, knot free, light, durable inside and outside, soft
what are the uses of cedar?
shed construction, quality fencing
what cost is mahogany?
high in cost
what are the properties of mahogany?
reddish brown timbers, properties can be quite different, strong, medium weight , difficult to work, used as a veneer often
what are the uses of mahogany?
veneered furniture, doors, staircases
what is the cost of beech?
medium in cost
what are the properties of beech?
light brown colour with characteristic speckles, hard, very tough, fairly heavy, not prone to splitting, has no taste or odour
what are the uses of beech?
saw handles, breadboard, kitchen utensils, toys and stools
what is the cost of oak?
high in cost
what are the properties of oak?
beige brown colour that changes to a rich deep brown with time, hard, strong, heavy, durable
what are the uses of oak?
furniture, kitchen units, staircases
