Primary & Middle School Physics

Grade 1 (Age 6–7)

1. 1 Observing the World: The Five Senses 9 solved exercises
2. 2 Hot and Cold 9 solved exercises
3. 3 Light and Shadows 9 solved exercises
4. 4 Day and Night: The Sun 9 solved exercises
5. 5 Floating and Sinking 9 solved exercises
6. 6 Magnets 9 solved exercises

Grade 2 (Age 7–8)

1. 7 Measuring Length 10 solved exercises
2. 8 Measuring Time 10 solved exercises
3. 9 Ice, Water, Steam 10 solved exercises
4. 10 Air Around Us 10 solved exercises
5. 11 The Moon in the Sky 10 solved exercises
6. 12 Pushes and Pulls: Forces 10 solved exercises
7. 13 Balance and Equilibrium 10 solved exercises

Grade 3 (Age 8–9)

1. 14 Solids, Liquids, Gases 11 solved exercises
2. 15 Temperature and Thermometers 11 solved exercises
3. 16 A First Electric Circuit 11 solved exercises
4. 17 Levers and Balance Scales 11 solved exercises
5. 18 The Sun in the Sky: Days and Seasons 11 solved exercises
6. 19 Sound Around Us 11 solved exercises
7. 20 Measuring Mass 11 solved exercises

Grade 4 (Age 9–10)

1. 21 Melting and Boiling: Changes of State 11 solved exercises
2. 22 Conductors and Insulators 11 solved exercises
3. 23 Series Circuits 11 solved exercises
4. 24 Weight and Mass 11 solved exercises
5. 25 Magnets and the Compass 11 solved exercises
6. 26 The Solar System 11 solved exercises
7. 27 How Sound Travels 11 solved exercises
8. 28 Light Travels in Straight Lines 11 solved exercises

Grade 5 (Age 10–11)

1. 29 Energy in Everyday Life 11 solved exercises
2. 30 Series and Parallel Circuits 11 solved exercises
3. 31 Simple Machines: Levers, Pulleys, Inclined Planes 11 solved exercises
4. 32 Mirrors and Reflection 11 solved exercises
5. 33 Stars and the Night Sky 11 solved exercises
6. 34 Heat and Insulation 11 solved exercises
7. 35 Speed: Distance and Time 11 solved exercises
8. 36 Air Pressure and Weather 11 solved exercises

Grade 6 (Age 11–12)

1. 37 Measurement in Science: Units and Instruments 12 solved exercises
2. 38 Mass and Volume 12 solved exercises
3. 39 Water in All Its States 12 solved exercises
4. 40 Describing Motion: Trajectory and Speed 12 solved exercises
5. 41 Electric Circuits and Safety 12 solved exercises
6. 42 Rectilinear Propagation of Light 12 solved exercises
7. 43 The Sun–Earth–Moon System 12 solved exercises
8. 44 Density: Why Things Float 12 solved exercises

Grade 7 (Age 12–13)

1. 45 States of Matter and Changes of State 12 solved exercises
2. 46 Volume, Mass, Density 12 solved exercises
3. 47 Circuits: Loops, Series, Parallel 12 solved exercises
4. 48 Short Circuits and Electrical Safety 12 solved exercises
5. 49 Sources of Light and Propagation 12 solved exercises
6. 50 Shadows and Eclipses 12 solved exercises
7. 51 Phases of the Moon 12 solved exercises
8. 52 Motion Graphs and Average Speed 12 solved exercises
9. 53 Sound: Production and Propagation 12 solved exercises

Grade 8 (Age 13–14)

1. 54 Electric Current and Its Effects 12 solved exercises
2. 55 Current Intensity and the Ammeter 12 solved exercises
3. 56 Voltage and the Voltmeter 12 solved exercises
4. 57 Current and Voltage Laws in Circuits 12 solved exercises
5. 58 Resistance and Ohm’s Law 12 solved exercises
6. 59 Colors and Spectra of Light 12 solved exercises
7. 60 Lenses and Images 12 solved exercises
8. 61 The Speed of Light; Distances in the Universe 12 solved exercises
9. 62 Sound: Speed, Pitch, Loudness 12 solved exercises

Grade 9 (Age 14–15)

1. 63 Gravitation 12 solved exercises
2. 64 Weight vs Mass: Measuring Forces 12 solved exercises
3. 65 Motion: Uniform and Varied 12 solved exercises
4. 66 Kinetic Energy and Road Safety 12 solved exercises
5. 67 Alternating Current 12 solved exercises
6. 68 Electric Power and Energy 12 solved exercises
7. 69 From Power Plant to Home: The Alternator 12 solved exercises
8. 70 Forms of Energy and Conversions 12 solved exercises
9. 71 From Atoms to Galaxies: Scales of the Universe 12 solved exercises

71 chapters — 71 online so far, and more publishing regularly. The complete book is already available as a free PDF you can read online.