CONTENTS

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CHAPTER PAGE
1. Gravitation 1
1. A real place where things weigh nothing and where there is no up or down 1
2. "Water seeks its own level" 6
3. The sea of compressed air in which we live: Air pressure 10
4. Sinking and floating: Displacement 23
5. How things are kept from toppling over: Stability 29
2. Molecular Attraction 36
6. How liquids are absorbed: Capillary attraction 36
7. How things stick to one another: Adhesion 41
8. The force that makes a thing hold together: Cohesion 44
9. Friction 49
3. Conservation of Energy 57
10. Levers 57
11. Inertia 66
12. Centrifugal force 72
13. Action and reaction 77
14. Elasticity 82
4. Heat 88
15. Heat makes things expand 88
16. Cooling from expansion 94
17. Freezing and melting 96
18. Evaporation 100
19. Boiling and condensing 107
20. Conduction of heat and convection 116
5. Radiant Heat and Light 122
21. How heat gets here from the sun; why things glow when they become very hot 122
22. Reflection 129
23. The bending of light: Refraction 136
24. Focus 142
25. Magnification 150
26. Scattering of light: Diffusion of light 158
27. Color 161
6. Sound 174
28. What sound is 174
29. Echoes 183
30. Pitch 185
7. Magnetism and Electricity 190
31. Magnets; the compass 190
32. Static electricity 196
8. Electricity 203
33. Making electricity flow 203
34. Conduction

COMMON SCIENCE

                                                                                                                                                                                                                                                                                                           

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