GCSE DT (AQA)

property and use of bleed proof paper

prevents ink bleeding through

presentation drawings

property and use of cartridge paper

good quality white surface

drawings

property and use of grid paper

different sizes available

quick model making

property and use of layout paper

thin, translucent

initial sketching

property and use of tracing paper

thin, transparent

making copies of drawings

property and use of corrugated board

strong

boxes

property and use of duplex board

1 side suitable for printing

food packaging

property and use of foil lined board

1 side covered with aluminium foil

takeaway packaging

property and use of foam core board

2 pieces of board with foam core = thick but light

model making

property and use of inkjet card board

treated so can be used in all inkjet printers

printing in inkjet printers

property and use of solid white board

good for printing on

book covers

property and use of ash

tough

ladders

property and use of beech

closed grained

toys

Property and use of Mahogany

aesthetic

quality furniture

property and use of oak

durable

flooring

property and use of balsa

easy to work with

Model making

list the 5 hardwoods

Beech, Oak, Mahogany, Balsa, Ash

define deciduous trees

shed leaves, hardwoods, flat leaves

Define coniferous trees

keeps leaves, softwoods, needle leaves

list 3 softwoods

larch, pine, spruce

property and use of larch

naturally rot resistant

Fencing

property and use of pine

easy to work with

Interior joinery

property and use of spruce

easy to work with

stringed musical instruments

2 categories of manufactured boards

laminated boards and compressed boards

Property and use of MDF (Medium Density Fibreboard)

smooth surface for painting

flat-pack furniture

how is MDF made

By mixing fine wood fibres with glue/resin, and compressing and allowing the mixture to harden

what glue is used in manufactured boards

formaldehyde resin

property and use of plywood

consistent strength throughout

roofing

how is plywood made

thin layers of wood stuck at 90 degrees in alternating directions with glue, 2 outside pieces often high quality woods

property and use of chipboard

cheaper

kitchen cupboards

how is chipboard made

large chips of wood glued together under pressure

define ferrous metals

metals that contain iron

composition of cast iron

iron + 3.5% carbon

composition of low carbon steel

iron + 0.15%-0.35% carbon

composition of high carbon steel

iron + 0.7%-1.4% carbon

property and use of cast iron

strong

car brake discs

Property and use of low carbon steel

tough

screws

Property and use of high carbon steel

hard

screwdrivers

Property and use of aluminium

Lightweight

aircraft bodies

property and use of copper

ductile

wires

property and use of zinc

corrosion resistant

galvanised coating

property and use of tin

low melting point

solder

composition of brass

65% copper, 35% zinc

composition of stainless steel

18% chromium, 8% nickel, iron

composition of duralumin

1% manganese, 1% magnesium, 4% copper, 90% aluminium

property and use of brass

corrosion resistant

taps

property and use of stainless steel

corrosion resistant

sinks

property and use of duralumin

corrosion resistant

fuel tanks

define crowdfunding

lots of people give small amounts

define industry

the manufacturing of goods in a factory

define cooperative

an organization that is owned and operated by its members

define just in time

The means by which the time gap between production and delivery to the customer is sharply reduced - cutting warehousing and storage costs

Define fair trade

to improve living conditions in developing countries

Define planned obsolescence

products that are planned to have short life spans

define computer numerically controlled

machines that are controlled by a computer

define computer aided design

using computers to draw, design and model

define computer aided manufacture

manufacturing products made by CAD

define flexible manufacturing system

production is organised into sections that perform different tasks

How does a nuclear power plant work?

uranium atoms split to produce heat, heats water into steam, steam turns a turbine to generate energy

How does tidal power work?

gate opens allowing water through, turns turbine, makes energy, gate closes and high tide brings in more water

how does a pumped energy storage system work

water is pumped up, water flows down through a turbine, little energy is needed to pump water back up

define graphene

thin 2D layer of carbon

property and use of graphene

conductor

batteries

property and use of metal foam

lightweight

soundproofing

property and use of titanium

high strength to density ratio

knee replacements

property and use of coated metals

increases corrosion resistance

tool handles

property and use of liquid crystal display

thin/flat

TVs

property and use of nanomaterials

antibacterial

sports clothing

use of teflon

non stick pans

property and use of corn starch polymers

degradable

single use cutlery

Define thermochromic and a use

materials that change colour at different temperatures

colour changing t shirts

define shape memory alloys and a use

return to original shape when heated

glasses frame

define photochromic and a use

change colour in different levels of light

security tags

property and use of Kevlar

strong

bullet proof vests

property and use of Gore-Tex

waterproof

walking boots

property and use of microfibres

breathable

sports clothing

3 parts of a system diagram

input, process, output

List 3 input devices

LDR, thermistor, switches

give a process device

microcontroller

list 3 output devices

lamps, LED, buzzer

list the 4 types of movement

linear, reciprocating, rotary, oscillating

give an example of a linear movement

paper trimmer

give an example of a reciprocating movement

needles on a sewing machine

give an example of a rotary movement

wheel turning

give an example of a oscillating movement

pendulum in a clock

1st order lever order and example

effort, fulcrum, load

seesaw

2nd order lever order and example

effort, load, fulcrum

wheelbarrow

3rd order lever order and example

load, effort, fulcrum

BBQ tongues

define a simple linkage

input, pivot, output

define bell crank mechanism and a use

turns through 90

bicycle braking system

define parallel motion linkage and a use

moves in the same direction, not in a straight line

sewing box levels

cam shapes

-eccentric circles

-pear shaped

-snail shaped

(used to give different amounts of time spent rising dwelling or falling)

velocity ratio for a pulley system

driven/driver

symbol for a rack and pinion mechanism

symbol for a chain and sprocket mechanism

Define thermoforming polymers

heated and shaped many times

Define thermosetting polymers

heated and shaped only once

property and use of acrylic

weather resistant

signs

property and use of HIPS

impact resistant

toys

property and use of HDPE

chemical resistant

pipes