year 9 Flashcards
Give an example of softwood
pine, cedar, larch
Give an example of hardwood
oak, beech, ash, mahogany, birch
how long does hardwood take to mature
100 years
give 3 advantages of hardwood
it is dense and stable looks attractive grows fruit (like acorns) doesn't crack or splinter is strong wide trunk
give 3 disadvantages of hardwood
takes a long time to mature very expensive rare rarely planted mostly imported oversea could become extinct close grain is difficult to work with
give 3 advantages of softwood
grows quickly can grow commercially cheaper strong and durable easy to work with
give 3 disadvantages of softwood
grain and colour isn't as attractive can bow and twist isn't too tough splinters easily can be water damaged has a small trunk
why might hardwood become extinct
it takes so long to grow the the people who planted would be dead by the time the hardwood has matured, meaning they wont be able to sell it
how long does softwood take to grow
30 years
give 3 disadvantages of manufactured board
they do not look nice plywood splinters when cut MDF doesn't look like wood chipboard doesn't have structured strength dust is hazardous to health glue prevents it being recycled tools blunt quickly on them
give 3 advantages of manufactured board
they are cheaper MDF is easy to cut they can be made in big chunks flat and looks strong resistant to warping made from recycled wood good for painting or staining easy to use on machines
Give an example of manufactured board
MDF, plywood, chipboard
what is a tenon saw used for?
cutting thicker wood
what is a scroll saw used for?
cutting curves in thinner materials
what is a coping saw used for?
cutting thin and curve pieces on wood manually
