A self contained chemical power pack that can produce a limited amount of electrical energy
32
New cards
What is fair trade?
Trade in which fair prices are paid to producers in developing countries
33
New cards
What is oblique drawing?
Simple 3D sketches with added depth to display a design or idea
34
New cards
What is a perspective drawing?
A 3D sketching technique that shows objects in proportion
35
New cards
What are sketch models?
Quick models made from easy-to-work-with materials to give a 3D representation of a design or idea
36
New cards
What are the disadvantages of sketch models?
They are often small, inaccurate and weak
37
New cards
What are the advantages of sketch models?
They are quick to make, give a representation of what a design might look like and they are made out of low-cost materials
38
New cards
What is UCD (user centred design)?
Design based on the understanding of users, the tasks they do and the environments they will use the product in
39
New cards
What is involved in UCD (user centred design)?
Focus groups, usability testing, participatory design, interviews and questionnaires
40
New cards
What is collaboration in design?
Working with others for mutual benefit
41
New cards
What is paper (and boards) measured in?
Gsm (grams per square meter)
42
New cards
What is corrugated cardboard?
A piece of fluted sheet sandwiched between two pieces of card to increase strength
43
New cards
What is card?
A thicker version of paper available in a wide variety of colours and sizes
44
New cards
What is corriflute?
Extruded corrugated plastic similar in structure to corrugated cardboard and is used for outdoor signs, plastic containers, packaging and for modelling
45
New cards
What is Styrofoam?
Expanded polystyrene foam with a blue tint and is used in insulation for caravans, boats, coolers and lorries and for models in design
46
New cards
What is hardwood?
Slow-growing wood which is dense, hard and heavy from deciduous trees
47
New cards
What is softwood?
Fast-growing wood which is cheaper than hardwood and usually softer, with it coming from coniferous trees
48
New cards
What is a ferrous metal?
A metal containing iron
49
New cards
What is a non-ferrous metal?
A metal which doesn't contain iron
50
New cards
What is an alloy?
A metal made by combining two or more metals
51
New cards
What is plastic memory?
The ability of thermo polymers to return to their original state after reheating
52
New cards
What is a mechanism?
A series of parts that work that work together to control forces and motion
53
New cards
What is a system?
A set of mechanical or electronic parts that work together to produce a desired output
54
New cards
What is a force?
A push, pull or twist
55
New cards
What is rotary motion?
Motion in a circular shape
56
New cards
What is linear motion?
Motion in a straight line
57
New cards
What is oscillating motion?
Motion in a circular shape but moving backwards and forwards
58
New cards
What is reciprocating motion?
Motion back and forwards in a straight line
59
New cards
What is an input?
The type of motion put into a mechanism
60
New cards
What is an output?
The type of motion a mechanism produces
61
New cards
What is a lever?
A rigid bar that is free to turn around a fulcrum
62
New cards
What is the load from a lever?
The output force of a lever
63
New cards
What is a fulcrum
The pivot around which a lever turns
64
New cards
What is the effort of a lever?
The input force of a lever
65
New cards
What is the arm length?
The distance between the force being exerted and the fulcrum
66
New cards
What is a cam and follower?
A mechanism which converts rotary motion (cam) into reciprocating motion (follower)
67
New cards
What is a pinion?
A small driver gear (smaller than the driver gear)
68
New cards
What is a shaft?
A rod that transfers the rotation through a mechanism
69
New cards
What is a simple gear train?
A pair of gears consisting of a driver gear and a driven gear
70
New cards
What is a spur gear?
A toothed wheel
71
New cards
What is torque?
A turning or twisting force
72
New cards
What is lubrication?
A substance applied to reduce friction between moving parts
73
New cards
What is a pulley and belt drive?
A method of transferring rotary motion between two shafts
74
New cards
What is a linkage?
A component used to direct forces and movement to where they are needed
75
New cards
What is a subsystem?
A section of a system with a specific role
76
New cards
What is a system diagram?
A diagram of interconnections and flow of signals in an electronic system
77
New cards
What is embedding?
Customising a microprocessor to be permanently placed within a product
78
New cards
What is a microcontroller?
A special-purpose microprocessor that adds functionality to a product
79
New cards
What is a physical quantity?
Something that can be measured, e.g light, temperature or speed
80
New cards
What is a program?
A set of instructions to tell a micro-controller how to carry out a task
81
New cards
What is a sensor?
A component that produces a signal in response to a specific physical quantity
82
New cards
What is a signal?
An electrical voltage that is used to represent information
83
New cards
What is latching?
A switch that stays on (or off) after a button is released
84
New cards
What is a momentary switch?
A switch that stays on only while it is held down
85
New cards
What is a piezo switch?
An electrical switch which generates an electric charge from a piezoelectric element, which turns on a field effect transistor, which causes the switch to be on or off
86
New cards
What is cloud computing?
A network of online servers that store and manage data
87
New cards
What is the internet of things?
Where two electrical devices connect within the existing internet infrastructure, to send and receive data without human intervention eg. bluetooth
88
New cards
What is nanotechnology?
Technology on a microscopic scale
89
New cards
What are economies of scale?
The cost advantages that manufacturers obtain due the size output or scale of their production
90
New cards
What is cellulose?
Wood fibres; an organic compound, structurally important in plant life
91
New cards
What is recycled paper?
Paper made from used paper products
92
New cards
What is virgin fibre paper?
Paper made from 'new', unused wood fibres
93
New cards
What does it mean if something is lightweight?
It weighs very little
94
New cards
What does rigid mean?
It is difficult to bend
95
New cards
How can structural integrity be increased?
Folding and triangulation
96
New cards
What is embossing?
A method of giving paper and card three-dimensional areas by creating a risen area using heat and pressure and a mold
97
New cards
What is CAD?
Computer-aided design
98
New cards
What is CAM?
Computer-aided manufacture (eg. laser cutter)
99
New cards
What is a milling machine?
CNC machines which use a rotating cutter to remove material from a surface