|  | 
| Concepts indexed by Age | 
|  | 
| 12 years | 
|  | changes of state | 
|  | changes in water | 
|  | model of the atom | 
|  | model of a solid | 
|  | model of a liquid | 
|  | from large to small | 
|  | attraction among masses (II) | 
|  | electric attraction | 
|  | attraction among masses (I) | 
|  | comets | 
|  | solar eclipse | 
|  | fixed stars | 
|  | Evolution of stars | 
|  | lunar phases | 
|  | Relative movement of the earth | 
|  | The planets | 
|  | rotation of the earth | 
|  | The signs of the zodiac | 
|  | The Solar System | 
|  | the earth's orbit | 
|  | The Milky Way | 
|  | density | 
|  | density (calculations) | 
|   | 
|  | 
| 13 years | 
|  | ammeter | 
|  | units of measurement | 
|  | voltage measurement | 
|  | The energy of material systems | 
|  | The changing earth | 
|  | Faraday's experiment | 
|  | electrical circuit (2) | 
|  | direct current | 
|  | electric current | 
|  | Ohm's law (2) | 
|  | Conservation of energy (II) | 
|  | transformation of energy | 
|  | electrical consumption | 
|  | RCCB | 
|  | fuses | 
|  | automatic switch | 
|  | the dangers of electricity | 
|  | data recording (I) | 
|  | light bulb | 
|  | extension cable | 
|  | conducting cable | 
|  | home-made battery | 
|  | AC electric generator | 
|  | switch | 
|  | electric motor | 
|  | batteries in parallel | 
|  | batteries in series | 
|  | electric battery | 
|  | electrical resistor | 
|  | biomass energy | 
|  | electrical energy | 
|  | mechanical energy | 
|  | nuclear energy | 
|  | chemical energy | 
|  | radiant energy | 
|  | thermal energy | 
|  | wind energy | 
|  | fossil fuels | 
|  | energy sources | 
|  | natural gas | 
|  | hydraulic energy | 
|  | tidal energy | 
|  | Nuclear power station | 
|  | petroleum | 
|  | renewable energy sources | 
|  | solar energy | 
|  | calculating speed (I) | 
|  | Calculating speed (II) | 
|  | Which moves faster? (I) | 
|  | speed or velocity? | 
|  | trajectory: what is it? | 
|  | trajectory / speed classification | 
|  | vectors: what are they? | 
|  | What is work? (II) | 
|  | What is energy? | 
|  | power (II) | 
|  | confirmation of hypotheses | 
|  | deductive method | 
|  | formulation of the problem | 
|  | experiment | 
|  | prior hypotheses | 
|  | inductive method | 
|  | analysis and interpretation, results | 
|  | observation | 
|  | data tables in UM | 
|  | tables and graphs in accelerated movements | 
|  | Ten to the power of.. | 
|  | matter causes gravity | 
|  | density (2) | 
|  | matter has inertia | 
|  | matter has mass | 
|  | mass has volume | 
|  | scales of observation | 
|  | direct measurements | 
|  | indirect measurements | 
|   | 
|  | 
| 14 years | 
|  | voltmeter | 
|  | consumer unit | 
|  | coal | 
|   | 
|  | 
| 15 years | 
|  | pressure and walls | 
|  | hydraulic press | 
|  | barometer | 
|  | hydraulic brakes | 
|  | the heating curve | 
|  | equilibrium between different states | 
|  | thermal equilibrium | 
|  | changes of state | 
|  | free fall in air | 
|  | free fall | 
|  | artificial satellites | 
|  | Pressure (what is it?) | 
|  | Archimedes's principle | 
|  | buoyancy | 
|  | equilibrium in liquids | 
|  | hydrostatic pressure I | 
|  | hydrostatic pressure II | 
|  | Pressure and depth | 
|  | conservation of energy (I) | 
|  | energy transfer (II) | 
|  | Specific heat | 
|  | latent heat | 
|  | the thermometer | 
|  | the mechanical equivalent of heat | 
|  | temperature scales | 
|  | heat | 
|  | Colour (what is it?) | 
|  | optical prism | 
|  | amplitude of vibration | 
|  | wavefront | 
|  | harmonic vibration | 
|  | tides | 
|  | types of lenses (flash) | 
|  | elements of a mirror | 
|  | nitid convex mirror | 
|  | concave mirror | 
|  | nitid concave mirror | 
|  | convex parabolic mirror | 
|  | parabolic mirrors | 
|  | image formation in concave mirrors | 
|  | image formation in mirrors | 
|  | mirror game I | 
|  | mirror game II | 
|  | types of mirrors | 
|  | three rays on a concave mirror | 
|  | model of a gas | 
|  | Photovoltaic cell | 
|  | telescope (elements) | 
|  | telescope (resolution range) | 
|  | telescope (optics) | 
|  | telescope (simulation) | 
|  | The solar system (theories) | 
|  | Convex lens | 
|  | spherical lens I | 
|  | spherical lens II | 
|  | types of lenses | 
|  | Newton's second law | 
|  | how forces originate | 
|  | Newton's first law | 
|  | Newton's 2nd law | 
|  | Newton's third law | 
|  | the variable intensity of gravity | 
|  | mass and weight | 
|  | measuring g | 
|  | acceleration 1 | 
|  | Which moves faster? (II) | 
|  | angular and linear displacements | 
|  | radians: what are they? | 
|  | how many radians are there? | 
|  | radians per second | 
|  | rpm/rps | 
|  | Frame of reference | 
|  | trajectory depending on the RS (I) | 
|  | trajectory depending on the RS (II) | 
|  | displacement vector (I) | 
|  | angular velocity | 
|  | period and frequency | 
|  | effects produced by forces | 
|  | What is the newton? | 
|  | kinetic energy | 
|  | potential energy | 
|  | power | 
|  | what is work? | 
|  | forces do work | 
|  | work of friction | 
|  | double-slit interference | 
|  | UCM acceleration | 
|  | Uniform Circular Motion | 
|  | area under the v/t curve (UCM) | 
|  | area under the v/t curve (UAM) | 
|  | s/t and v/t graphs of a URM | 
|  | Uniform Rectilinear Motion | 
|  | Uniformly Accelerated Rectilinear Motion | 
|  | tables and graphs in UM | 
|  | decomposition of forces | 
|  | how to measure forces | 
|  | representation of forces | 
|  | How forces are added together | 
|  | forces of adhesion | 
|  | forces of cohesion | 
|  | surface tension I | 
|  | surface tension II | 
|  | diffraction | 
|  | waves in the sea | 
|  | longitudinal wave | 
|  | transverse wave | 
|   | 
|  | 
| 16 years | 
|  | electrical circuit | 
|  | hydraulic circuit | 
|  | mixed circuit | 
|  | alternating current | 
|  | Ohm's law | 
|  | The generalization of Ohm's law | 
|  | conservation of energy | 
|  | Efficiency of a machine | 
|  | work-kinetic energy theorem | 
|  | electric power | 
|  | digital instruments | 
|  | absolute error | 
|  | relative error | 
|  | U.N.E. standards | 
|  | data gathering (II) | 
|  | sensitivity of an instrument | 
|  | International System of Units | 
|  | instrumental errors | 
|  | representative value | 
|  | connection of generators | 
|  | electrical resistance | 
|  | resistors in parallel | 
|  | resistors in series | 
|  | free fall | 
|  | meeting of moving objects | 
|  | ascent and descent of an object | 
|  | electric potential energy | 
|  | electric field intensity I | 
|  | electric field intensity II | 
|  | electric current and power | 
|  | Coulomb's law | 
|  | the movement of electric charges | 
|  | electric potential and work | 
|  | lines of force | 
|  | instantaneous acceleration | 
|  | acceleration 2 | 
|  | equation of motion | 
|  | tangential and normal components of acceleration (I) | 
|  | tangential and normal components of acceleration (II) | 
|  | moving frame of reference | 
|  | sun-earth-moon reference frame | 
|  | position vector and trajectory | 
|  | displacement vector (II) | 
|  | vectores: composition | 
|  | instantaneous velocity | 
|  | average velocity | 
|  | coefficient of dynamic friction | 
|  | coefficient of static friction | 
|  | What is friction? | 
|  | What is the normal force? | 
|  | graph representing work | 
|  | work done streching a spring | 
|  | work carried out by a pendulum | 
|  | the principle of superposition II | 
|  | Carnot's ideal engine | 
|  | the internal combustion engine | 
|  | s/t, v/t and a/t graphs of a UCM | 
|  | s/t, v/t and a/t graphs | 
|  | measuring the coefficient of friction | 
|  | the inclined plane | 
|  | significant figures | 
|  | dimensional equation | 
|  | conversion factors | 
|  | multiples and submultiples | 
|  | scientific notation | 
|  | order of magnitude | 
|  | speed of measurement | 
|  | rounding a measurement | 
|  | Joule's experiment | 
|  | perpetual motion | 
|  | the first law of thermodynamics | 
|  | the second law of thermodynamics | 
|  | physical magnitudes | 
|   | 
|  | 
| 17 years | 
|  | oscilloscope | 
|  | field created by a coil I | 
|  | field created by a coil II | 
|  | field created by a current | 
|  | field created by a moving charge | 
|  | magnetic flux | 
|  | magnetic force on a charged particle (front view) | 
|  | magnetic force on a moving charge (side view) | 
|  | magnetic force on a current | 
|  | magnetic force on a moving charge | 
|  | magnets and currents | 
|  | mutual induction | 
|  | Ampere's law | 
|  | Faraday's law | 
|  | Faraday's law (quantitative) | 
|  | lines of force in the magnetic field | 
|  | natural magnetism | 
|  | RLC circuit | 
|  | harmonics | 
|  | Huygens's principle | 
|  | alternator | 
|  | self-inductance | 
|  | transformer | 
|  | The shape of galaxies | 
|  | Kepler's laws | 
|  | law of reflection | 
|  | law of refraction | 
|  | gravitational potential energy | 
|  | apparent gravity | 
|  | Measurement of G | 
|  | equipotential surfaces | 
|  | wave equation | 
|  | angular momentum | 
|  | the principle of superposition I | 
|  | Photovoltaic cell | 
|  | De Broglie's hypothesis | 
|  | quantum tunnelling | 
|  | Fluorescence | 
|  | Phosphorescence | 
|  | wave function | 
|  | black body (graph) | 
|  | the uncertainty principle | 
|  | measurement in quantum mechanics | 
|  | a classical particle in a potential well | 
|  | quantum potential well | 
|  | black body (radiation) | 
|  | SHM: acceleration | 
|  | SHM: phase difference | 
|  | SHM: fundamental magnitudes | 
|  | SHM / UCM | 
|  | SHM: position | 
|  | SHM: What is it? | 
|  | SHM: representation | 
|  | SHM: velocity | 
|  | The television | 
|  | the oscilloscope | 
|  | Crookes tube | 
|  | cathode ray tube | 
|  | speed and mass of the electrons | 
|  | absorption | 
|  | attenuation | 
|  | Doppler effect | 
|  | interference | 
|  | polarization | 
|  | reflection | 
|  | total reflection | 
|  | refraction | 
|  | Soddy's first law | 
|  | Soddy's second law | 
|  | Radioactivity | 
|  | Radioactive particles | 
|  | Radioactive constant | 
|  | Absorbed dose | 
|  | Equivalent dose | 
|  | Radioactive equilibrium | 
|  | Nuclear stability | 
|  | Nuclear fission | 
|  | Nuclear fusion | 
|  | alpha particles | 
|  | beta particles | 
|  | Half-life | 
|  | What is radioactivity? | 
|  | artificial radioactive series | 
|  | natural radioactive series | 
|  | mean lifetime | 
|  | contraction of space | 
|  | contraction of time | 
|  | Michelson-Morley experiment | 
|  | twins paradox | 
|  | relativistic paradox | 
|  | the magnetic problem | 
|  | Gamma radiation | 
|  | relativity (Galileo) | 
|  | inertial systems | 
|  | non-inertial reference frames | 
|  | interstellar travel | 
|  | standing waves | 
|  | Bohr's atom | 
|  | quantum atom | 
|  | Rutherford's atom |